Implement V2 interfaces and remaining V1 interfaces

Also adds some tests to registry tests for V1 stuff.
Note: All *registry* tests currently pass, but as verbs are not yet converted, the verb tests in registry_tests.py currently fail.

data/model/blob.py

@@ -3,7 +3,7 @@ from uuid import uuid4
 from data.model import (tag, _basequery, BlobDoesNotExist, InvalidBlobUpload, db_transaction,
                         storage as storage_model, InvalidImageException)
 from data.database import (Repository, Namespace, ImageStorage, Image, ImageStoragePlacement,
-                           BlobUpload)
+                           BlobUpload, ImageStorageLocation)
 
 
 def get_repo_blob_by_digest(namespace, repo_name, blob_digest):
@@ -63,7 +63,9 @@ def get_blob_upload(namespace, repo_name, upload_uuid):
   """
   try:
     return (BlobUpload
-            .select()
+            .select(BlobUpload, ImageStorageLocation)
+            .join(ImageStorageLocation)
+            .switch(BlobUpload)
             .join(Repository)
             .join(Namespace, on=(Namespace.id == Repository.namespace_user))
             .where(Repository.name == repo_name, Namespace.username == namespace,