Switch to using straight docker IDs instead of a hashing scheme

test/test_api_usage.py

@@ -1205,6 +1205,7 @@ class TestListAndGetImage(ApiTestCase):
                                 params=dict(repository=ADMIN_ACCESS_USER + '/simple'))
 
     assert len(json['images']) > 0
+
     for image in json['images']:
       assert 'id' in image
       assert 'tags' in image
@@ -1212,7 +1213,6 @@ class TestListAndGetImage(ApiTestCase):
       assert 'comment' in image
       assert 'command' in image
       assert 'ancestors' in image
-      assert 'internal_id' in image
       assert 'size' in image
 
       ijson = self.getJsonResponse(RepositoryImage,