wsconsume prints SL4J log warning message

[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ jbossws-cxf-shared-tests ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-antrun-plugin:1.8:run (wsconsume) @ jbossws-cxf-shared-tests ---
[INFO] Executing tasks
main:
wsconsumeWindows:
wsconsumeNotWindows:
[wsconsume] Consuming wsdl: /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/src/test/resources/jaxws/complex/META-INF/wsdl/RegistrationService.wsdl
[wsconsume] Command invoked: org.jboss.ws.tools.cmd.WSConsume -k -p org.jboss.test.ws.jaxws.complex -o /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target -s /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target/wsconsume/java -t 2.2 -v /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/src/test/resources/jaxws/complex/META-INF/wsdl/RegistrationService.wsdl
[wsconsume] Loading FrontEnd jaxws ...SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[wsconsume] SLF4J: Defaulting to no-operation (NOP) logger implementation
[wsconsume] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[wsconsume]
[wsconsume] Loading DataBinding jaxb ...
[wsconsume] wsdl2java -compile -exsh false -p org.jboss.test.ws.jaxws.complex -d /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target/wsconsume/java -verbose -classdir /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target -allowElementReferences file:/Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/src/test/resources/jaxws/complex/META-INF/wsdl/RegistrationService.wsdl
[wsconsume] wsdl2java - Apache CXF 3.5.2-jbossorg-3
[wsconsume]
[wsconsume] Consuming wsdl: /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/src/test/resources/jaxws/holder/META-INF/wsdl/HolderService.wsdl
[wsconsume] Command invoked: org.jboss.ws.tools.cmd.WSConsume -k -p org.jboss.test.ws.jaxws.holder -o /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target -s /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/target/wsconsume/java -t 2.2 -v /Users/jimma/data/code/jbossws/jbossws-cxf/modules/testsuite/shared-tests/src/test/resources/jaxws/holder/META-INF/wsdl/HolderService.wsdl