Add message about disabled oauth feature in user profile

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/doorkeeper/applications/index.html.haml

@@ -16,6 +16,9 @@
         = _('Add new application')
       = render 'form', application: @application
       %hr
+    - else
+      .bs-callout.bs-callout-disabled
+        = _('Adding new applications is disabled in your GitLab instance. Please contact your GitLab administrator to get the permission')
     - if user_oauth_applications?
       .oauth-applications
         %h5

locale/gitlab.pot

@@ -355,6 +355,9 @@ msgstr ""
 msgid "Add users to group"
 msgstr ""
 
+msgid "Adding new applications is disabled in your GitLab instance. Please contact your GitLab administrator to get the permission"
+msgstr ""
+
 msgid "Admin Area"
 msgstr ""