Fix missing sync repo task

This was not caught on celery 4 upgrade

Author: agjohnson

readthedocs/oauth/__init__.py

@@ -0,0 +1 @@
+default_app_config = 'readthedocs.oauth.apps.OAuthConfig'

readthedocs/oauth/tasks.py

@@ -11,6 +11,8 @@
 
 @permission_check(user_id_matches)
 class SyncRemoteRepositories(PublicTask):
+
+    name = __name__ + '.sync_remote_repositories'
     public_name = 'sync_remote_repositories'
     queue = 'web'
 

readthedocs/restapi/views/task_views.py

@@ -53,7 +53,7 @@ def job_status(request, task_id):
 @decorators.permission_classes((permissions.IsAuthenticated,))
 @decorators.renderer_classes((JSONRenderer,))
 def sync_remote_repositories(request):
-    result = tasks.sync_remote_repositories.delay(
+    result = tasks.SyncRemoteRepositories().delay(
         user_id=request.user.id)
     task_id = result.task_id
     return Response({