Fix NPE when building clustering API modules using CapabilityServiceSupport

10:08:19,620 ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool -- 36) WFLYCTL0013: Operation ("add") failed - address: ([
    ("subsystem" => "ejb3"),
    ("service" => "remote")
]): java.lang.NullPointerException
	at org.wildfly.clustering.server.dispatcher.LocalCommandDispatcherFactoryBuilder.build(LocalCommandDispatcherFactoryBuilder.java:69)
	at org.jboss.as.ejb3.subsystem.EJB3RemoteServiceAdd.installRuntimeServices(EJB3RemoteServiceAdd.java:128)
	at org.jboss.as.ejb3.subsystem.EJB3RemoteServiceAdd.performRuntime(EJB3RemoteServiceAdd.java:87)
	at org.jboss.as.controller.AbstractAddStepHandler.performRuntime(AbstractAddStepHandler.java:337)
	at org.jboss.as.controller.AbstractAddStepHandler$1.execute(AbstractAddStepHandler.java:151)
	at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:940)
	at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:683)
	at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:382)
	at org.jboss.as.controller.ParallelBootOperationStepHandler$ParallelBootTask.run(ParallelBootOperationStepHandler.java:368)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
	at org.jboss.threads.JBossThread.run(JBossThread.java:320)