Merge branch 'axios-path-locks' into 'master'

Replace $.post with axios in initPathLocks

See merge request gitlab-org/gitlab-ee!4516

ee/app/assets/javascripts/path_locks.js

+import flash from '~/flash';
+import { __ } from '~/locale';
+import axios from '~/lib/utils/axios_utils';
+
 export default function initPathLocks(url, path) {
   $('a.path-lock').on('click', (e) => {
     e.preventDefault();
 
-    $.post(url, {
+    axios.post(url, {
       path,
-    }, () => {
+    }).then(() => {
       location.reload();
-    });
+    }).catch(() => flash(__('An error occurred while initializing path locks')));
   });
 }