When master receives a join request it should send finalize join operation always, so that if a previous join request is done on master but could not finalized, it can be finalized with later join request.
removing test for now, because it does not reproduces the scenario exactly and sometimes fail because of an unwanted merge scenerio.
Merge pull request #3913 from sancar/fix/topicSplitBrain/maint3.x

When master receives a join request it should send finalize join ope…