Added top-level namespaces when pruning XML tree for client rpc calls and restconf GET

Added new xmlns_set_all()

apps/backend/backend_get.c

@@ -525,7 +525,6 @@ with_defaults(cxobj *xe, cxobj *xret) {
 	    }
 	}
     }
-    ok:
         retval = 0;
      done:
         return retval;