Merge changes I1ea2b411,I8bc25d32,I9176c6ff,I061e1eb9,Ib95cf23e, ...

* changes:
  Enable notedb tests for LabelTypeIT
  Copy labels dynamically in ApprovalsUtil.byPatchSet
  Remove unused ApprovalsUtil from ChangeControl
  Extract a non-caching ChangeKindCache implementation for tests
  Persist the ChangeKindCache
  Merge branch 'stable-2.9'