Dismantle jbossws-shared-testsuite

With the JBossWS-Native stack having gone since some time, the JAXRPC requirement having been removed from EE7, and the Apache CXF based stack being consolidated, it's time to take apart the jbossws-shared-testsuite project component. The actual testsuite should be moved to the jbossws-cxf stack (possibly a new sub-module of 'modules/testsuite', basically at the same level of 'cxf-tests' and 'cxf-spring-tests'), while the remaining classes and scripts there that are still relevant should be moved to either jbossws-common or again jbossws-cxf.