Move db.sql.open to db.open

Now that mongo has been ripped out and sqlalchemy is already providing
the database abstraction, there is no need to hide everything in the sql
module. Transition db.sql.open to db.open and adapt all direct importers.

mediagoblin/gmg_commands/dbupdate.py

@@ -18,7 +18,7 @@ import logging
 
 from sqlalchemy.orm import sessionmaker
 
-from mediagoblin.db.sql.open import setup_connection_and_db_from_config
+from mediagoblin.db.open import setup_connection_and_db_from_config
 from mediagoblin.db.sql.util import MigrationManager
 from mediagoblin.init import setup_global_and_app_config
 from mediagoblin.tools.common import import_component