Celery wasn't really being properly connected during tests.

Lots of fixes to do this.

 - setup_celery_from_config no longer responsible for checking
   'celery_setup_elsewhere'; that's the app's job.  (This was a problem
   because more than the app was relying on using this function)
 - Allow us to specifically set the config file we're setting up
   celery from with setup_self
 - Set up celery_always_eager.  This is something we strongly want
   while doing tests.
 - Instead of setting up the app in the get_test_app method, let's set
   that up simply by importing from_tests, which should itself up via
   from_celery being the environment variable being set.

mediagoblin/tests/test_mgoblin_app.ini

@@ -7,6 +7,9 @@ email_sender_address = "notice@mediagoblin.example.org"
 email_debug_mode = true
 db_name = __mediagoblin_tests__
 
-# Celery shouldn't be set up by the paste app factory as it's set up
-# elsewhere
+# Celery shouldn't be set up by the application as it's setup via
+# mediagoblin.celery_setup.from_celery
 celery_setup_elsewhere = true
+
+[celery]
+celery_always_eager = true

mediagoblin/tests/tools.py

@@ -21,9 +21,8 @@ import os, shutil
 from paste.deploy import loadapp
 from webtest import TestApp
 
-from mediagoblin import util, mg_globals
+from mediagoblin import util
 from mediagoblin.config import read_mediagoblin_config
-from mediagoblin.celery_setup import setup_celery_from_config
 from mediagoblin.decorators import _make_safe
 from mediagoblin.db.open import setup_connection_and_db_from_config
 
@@ -36,7 +35,6 @@ TEST_APP_CONFIG = pkg_resources.resource_filename(
 TEST_USER_DEV = pkg_resources.resource_filename(
     'mediagoblin.tests', 'test_user_dev')
 MGOBLIN_APP = None
-CELERY_SETUP = False
 
 USER_DEV_DIRECTORIES_TO_SETUP = [
     'media/public', 'media/queue',
@@ -60,8 +58,10 @@ def suicide_if_bad_celery_environ():
 def get_test_app(dump_old_app=True):
     suicide_if_bad_celery_environ()
 
+    # Leave this imported as it sets up celery.
+    from mediagoblin.celery_setup import from_tests
+
     global MGOBLIN_APP
-    global CELERY_SETUP
 
     # Just return the old app if that exists and it's okay to set up
     # and return
@@ -103,13 +103,6 @@ def get_test_app(dump_old_app=True):
     app = TestApp(test_app)
     MGOBLIN_APP = app
 
-    # setup celery
-    if not CELERY_SETUP:
-        setup_celery_from_config(
-            mg_globals.app_config, mg_globals.global_config,
-            set_environ=True)
-        CELERY_SETUP = True
-
     return app