How to enable Apache Axis JAX-RPC client in EAP 6

Issue

• While migrating a legacy application from EAP 4.3 to EAP 6. Users are using an Apache Axis JAX-RPC client, but it doesn't work anymore.

org.jboss.ws.WSException: Cannot obtain java type mapping for: {http://example.com/}Ping
  at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCMetaDataBuilder.processDocElement(JAXRPCMetaDataBuilder.java:588)
  at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCMetaDataBuilder.buildParameterMetaDataDoc(JAXRPCMetaDataBuilder.java:848)
  at  org.jboss.ws.metadata.builder.jaxrpc.JAXRPCMetaDataBuilder.setupOperationsFromWSDL(JAXRPCMetaDataBuilder.java:208)
  at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCClientMetaDataBuilder.buildMetaDataInternal(JAXRPCClientMetaDataBuilder.java:198)
  at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCClientMetaDataBuilder.buildMetaData(JAXRPCClientMetaDataBuilder.java:120)
  at org.jboss.ws.core.jaxrpc.client.ServiceImpl.init(ServiceImpl.java:168)
  at org.jboss.ws.core.jaxrpc.client.ServiceImpl.<init>(ServiceImpl.java:120)
  at org.jboss.ws.core.jaxrpc.client.ServiceFactoryImpl.createService(ServiceFactoryImpl.java:154)
  at org.jboss.ws.core.jaxrpc.client.ServiceFactoryImpl.createService(ServiceFactoryImpl.java:125)