celery: Reorder celery imports to fix case where celery tasks were being

registered before celery config was setup. Added comments to make this
clear so we don't chase this problem in the future until it is refactored

rhodecode/config/environment.py

@@ -34,11 +34,16 b' from pylons.configuration import PylonsC'
 from pylons.error import handle_mako_error
 from pyramid.settings import asbool
 
-# don't remove this import it does magic for celery
-from rhodecode.lib import celerypylons  # noqa
+# ------------------------------------------------------------------------------
+# CELERY magic until refactor - issue #4163 - import order matters here:
+from rhodecode.lib import celerypylons  # this must be first, celerypylons
+                                        # sets config settings upon import
 
-import rhodecode.lib.app_globals as app_globals
+import rhodecode.integrations           # any modules using celery task
+                                        # decorators should be added afterwards:
+# ------------------------------------------------------------------------------
 
+from rhodecode.lib import app_globals
 from rhodecode.config import utils
 from rhodecode.config.routing import make_map
 from rhodecode.config.jsroutes import generate_jsroutes_content

rhodecode/config/middleware.py

@@ -39,7 +39,6 b' from routes.middleware import RoutesMidd'
 import routes.util
 
 import rhodecode
-import rhodecode.integrations # do not remove this as it registers celery tasks
 from rhodecode.config import patches
 from rhodecode.config.routing import STATIC_FILE_PREFIX
 from rhodecode.config.environment import (