Merge changes Ib5cd2c27,I4448a354 into sc-dev

* changes:
  [NS10] Fix a bug where registerIgnoringScore is broken
  [NS09] Implement the new ranking code
tree: a21c6566694fb37f80fd55902135139dbeab75bf
  1. framework/
  2. service/
  3. test/
  4. OWNERS
  5. TEST_MAPPING