Merge branch 'stable-2.8'

* stable-2.8:
  ReceiveCommits: Fix PUSH permission check for draft changes
  Don't allow project owners to create branches if create is blocked
  Add acceptance test for branch creation
  Wrong button is passed to revert action handler

Conflicts:
	gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git/BUCK
	gerrit-server/src/test/java/com/google/gerrit/server/project/RefControlTest.java

Change-Id: I11e4b0c846fa60b1bec67c4ca90de3d8fce6df8c