Start ext_mod before module as it's setup contrib path

src/ejabberd_app.erl

@@ -65,8 +65,8 @@ start(normal, _Args) ->
     %ejabberd_debug:eprof_start(),
     %ejabberd_debug:fprof_start(),
     maybe_add_nameservers(),
-    start_modules(),
     ext_mod:start(),
+    start_modules(),
     ejabberd_listener:start_listeners(),
     ?INFO_MSG("ejabberd ~s is started in the node ~p", [?VERSION, node()]),
     Sup;