ServiceRef converts JAX-RPC handlers into JAX-WS handlers

org.apache.openejb.jee.ServiceRef.getHandlerChains() function effectively converts JAX-RPC handlers into JAX-WS handlers. The JAX-RPC handlers should only be listed directly under the <service-ref> entry while the JAX-WS handlers should be listed under the <handler-chains> element. The current function will transform the handlers if the getHandlerChains() function is called and when the ServiceRef is serialized the JAX-RPC handlers will appear under the <handler-chains> element. That is incorrect.