Merge changes from topic "revert-1849420-openjdk11-j-u-c-merge-GXXAALPPMY"

* changes:
  Revert "Updating java.util.concurrent to 11+28"
  Revert "Fixing the j.u.c compilation after merge with upstream"
  Revert "Adding unit test for SubmissionPublisher"
  Revert "Adding unit test for new API in TimeUnit"
  Revert "Adding unit tests for the new APIs from j.u.c 11+28"