fix(core): correct parameter order in neu_req_del_tag_copy

- Fix reversed parameter order in neu_req_del_tag_copy call at manager.c:1488
- Add missing return statement on strdup failure in neu_req_del_tag_copy function

include/neuron/msg.h

@@ -704,6 +704,7 @@ static inline int neu_req_del_tag_copy(neu_req_del_tag_t *dst,
                 free(dst->tags[i]);
             }
             free(dst->tags);
+            return -1;
         }
     }
     return 0;

src/core/manager.c

@@ -1465,7 +1465,7 @@ static int manager_loop(enum neu_event_io_type type, int fd, void *usr_data)
                         neu_msg_get_header(msg_copy);
                     neu_req_del_tag_t *cmd_copy =
                         (neu_req_del_tag_t *) &header_copy[1];
-                    neu_req_del_tag_copy(cmd, cmd_copy);
+                    neu_req_del_tag_copy(cmd_copy, cmd);
                     forward_msg(manager, header_copy, app->app_name);
                 }