Make the app config more powerful in terms of injecting fake dependencies. Refactor the tests to use metaclasses and to actually all run.

endpoints/registry.py

@@ -6,7 +6,6 @@ from functools import wraps
 from datetime import datetime
 from time import time
 
-import storage
 from data.queue import image_diff_queue
 
 from app import app
@@ -17,7 +16,7 @@ from auth.permissions import (ReadRepositoryPermission,
 from data import model
 
 
-store = storage.load()
+store = app.config['STORAGE']
 logger = logging.getLogger(__name__)