[EJBCLIENT-370] Add a default impl to the EJBTransportProvider.close …

…method so wildfly-http-ejb-client can compile without changes (#456)

src/main/java/org/jboss/ejb/client/EJBTransportProvider.java

@@ -50,5 +50,5 @@ default void notifyRegistered(EJBReceiverContext receiverContext) {}
      */
     EJBReceiver getReceiver(EJBReceiverContext receiverContext, String uriScheme) throws IllegalArgumentException;
 
-    void close(EJBReceiverContext receiverContext) throws Exception;
+    default void close(EJBReceiverContext receiverContext) throws Exception {}
 }