Merge changes Ib5cd2c27,I4448a354 into sc-dev

* changes:
  [NS10] Fix a bug where registerIgnoringScore is broken
  [NS09] Implement the new ranking code
tree: ee1547f9e2e4b982f3f248d1259ff05138332a5d
  1. framework/
  2. service/
  3. services/
  4. test/
  5. tests/
  6. OWNERS
  7. TEST_MAPPING