Add a check that will fail if we try to mislink V1 layers

Also logs some useful information

data/model/image.py

@@ -133,7 +133,8 @@ def invert_placement_query_results(placement_query):
 
 def lookup_repository_images(repo, docker_image_ids):
   return (Image
-          .select()
+          .select(Image, ImageStorage)
+          .join(ImageStorage) # TODO(jschorr): Remove once no longer needed in v2/manifest.py.
           .where(Image.repository == repo, Image.docker_image_id << docker_image_ids))