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

workers/dockerfilebuild.py

@@ -13,7 +13,6 @@ from base64 import b64encode
 from requests.exceptions import ConnectionError
 
 from data.queue import dockerfile_build_queue
-from data.userfiles import UserRequestFiles
 from data import model
 from data.database import db as db_connection
 from app import app
@@ -151,9 +150,7 @@ def babysit_builder(request):
     ssh_client.exec_command(remove_auth_cmd)
 
     # Prepare the signed resource url the build node can fetch the job from
-    user_files = UserRequestFiles(app.config['AWS_ACCESS_KEY'],
-                                  app.config['AWS_SECRET_KEY'],
-                                  app.config['REGISTRY_S3_BUCKET'])
+    user_files = app.config['USERFILES']
     resource_url = user_files.get_file_url(repository_build.resource_key)
 
     # Start the build server