Merge pull request #15577 from rabbitmq/use-data-dir-in-rabbit_plugins

rabbit_plugins: Use `rabbit:data_dir/0` not `rabbit_mnesia:dir/0`

Author: dumbbell

deps/rabbit/src/rabbit_plugins.erl

@@ -99,7 +99,7 @@ user_provided_plugins_data_dir() ->
         {ok, PluginsDataDir} ->
             PluginsDataDir;
         _ ->
-            DataDir = rabbit_mnesia:dir(),
+            DataDir = rabbit:data_dir(),
             filename:join([DataDir, "user_provided_plugins_data_dir"])
     end.