Implement some new methods on the storage engines.

storage/swift.py

@@ -13,6 +13,8 @@ logger = logging.getLogger(__name__)
 class SwiftStorage(BaseStorage):
   def __init__(self, swift_container, storage_path, auth_url, swift_user,
                swift_password, auth_version=None, os_options=None, ca_cert_path=None):
+    super(SwiftStorage, self).__init__()
+
     self._swift_container = swift_container
     self._storage_path = storage_path