Merge branch 'stable-3.9'

* stable-3.9:
  Fix ApplyObjectActionIT flakiness due to the wrong ref used
  Force async fetch as a fallback for sync replication
  Index change asynchronously upon refs replicated event
  Address follow-up comments to Change 396868
  Introduce wait for replication events to reduce flaky tests
  Fail apply-object on change /meta when missing patch-set

Change-Id: Ib0783cb2b0863f7327b415ee9917956e1cc5f1a1
tree: b6a573f7de4d2ef39d216321a0bb1224808884d8
  1. example-setup/
  2. src/
  3. .gitignore
  4. BUILD
  5. Jenkinsfile
  6. LICENSE