Allow size of pages in V2 api to be configurable

util/config/schema.py

@@ -383,6 +383,10 @@ CONFIG_SCHEMA = {
       'description': 'The types of avatars to display, either generated inline (local) or Gravatar (gravatar)',
       'enum': ['local', 'gravatar'],
     },
+    'V2_PAGINATION_SIZE': {
+      'type': 'number',
+      'description': 'The number of results returned per page in V2 registry APIs',
+    },
 
     # Time machine and tag expiration settings.
     'FEATURE_CHANGE_TAG_EXPIRATION': {