Switch deprecated BROKER_HOST to new BROKER_URL

People will need to switch that setting in their mediagoblin.ini too.
Make sure we RELEASE NOTE this.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

mediagoblin/tests/test_celery_setup.py

@@ -55,6 +55,6 @@ def test_setup_celery_from_config():
         pkg_resources.resource_filename('mediagoblin.tests', 'celery.db'))
 
     assert fake_celery_module.BROKER_TRANSPORT == 'sqlalchemy'
-    assert fake_celery_module.BROKER_HOST == (
+    assert fake_celery_module.BROKER_URL == (
         'sqlite:///' +
         pkg_resources.resource_filename('mediagoblin.tests', 'kombu.db'))

mediagoblin/tests/test_mgoblin_app.ini

@@ -23,7 +23,7 @@ base_dir = %(here)s/user_dev/media/queue
 [celery]
 CELERY_ALWAYS_EAGER = true
 CELERY_RESULT_DBURI = "sqlite:///%(here)s/user_dev/celery.db"
-BROKER_HOST = "sqlite:///%(here)s/user_dev/kombu.db"
+BROKER_URL = "sqlite:///%(here)s/test_user_dev/kombu.db"
 
 [plugins]
 [[mediagoblin.plugins.api]]