WFLY-1332 Add support for handling compressed messages in EJB invocations

https://issues.jboss.org/browse/EJBCLIENT-76 introduced the support for compressing EJB protocol messages during EJB invocations. The commit here adds the necessary server side support to recognize such compressed messages. It also adds a testcase to verify that a EJB method marked with a @org.jboss.ejb.client.annotation.CompressionHint can be invoked without any problems.