Although this is not any more requirement for EAP 8, for EAP 7.4 artifacts should be synced to Java 6.

wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/NoOpLog.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/SimpleLog$1.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/SimpleLog.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/SLF4JLocationAwareLog.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/SLF4JLog.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/SLF4JLogFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/AvalonLogger.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/Log4JLogger.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/WeakHashtable.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/WeakHashtable$1.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/Jdk14Logger.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/ServletContextCleaner.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/WeakHashtable$WeakKey.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/LogKitLogger.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/LogFactoryImpl$3.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/LogFactoryImpl$1.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/WeakHashtable$Referenced.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/Jdk13LumberjackLogger.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/LogFactoryImpl.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/LogFactoryImpl$2.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/impl/WeakHashtable$Entry.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/Log.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogConfigurationException.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogSource.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$4.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$3.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$6.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$5.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$1.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/apache/commons/logging/LogFactory$2.class: compiled Java class data, version 46.0 (Java 1.2)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/event/EventConstants.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/event/EventRecodingLogger.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/event/Level.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/event/LoggingEvent.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/event/SubstituteLoggingEvent.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/BasicMarker.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/BasicMarkerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/BasicMDCAdapter$1.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/BasicMDCAdapter.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/FormattingTuple.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/MarkerIgnoringBase.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/MessageFormatter.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/NamedLoggerBase.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/NOPLogger.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/NOPLoggerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/NOPMDCAdapter.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/SubstituteLogger.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/SubstituteLoggerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/Util$1.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/Util$ClassContextSecurityManager.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/helpers/Util.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/ILoggerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/IMarkerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/Logger.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/LoggerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/Marker.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/MarkerFactory.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/MDC$1.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/MDC$MDCCloseable.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/MDC.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/spi/LocationAwareLogger.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/spi/LoggerFactoryBinder.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/spi/MarkerFactoryBinder.class: compiled Java class data, version 49.0 (Java 1.5)
wildfly-elytron-1.15.9.Final-redhat-00001.jar/org/slf4j/spi/MDCAdapter.class: compiled Java class data, version 49.0 (Java 1.5)