Alexey Serbin has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/8709 )

Change subject: KUDU-2230: the leader is always a viable voter
......................................................................

KUDU-2230: the leader is always a viable voter

While iterating over peers in PeerMessageQueue::SafeToEvictUnlocked(),
assume that the leader is always a viable voter.  Prior to this patch,
the leader itself was not counted as a viable voter since the leader
does not update its own last_communication_time.

Both test scenarios TestDontEvictIfRemainingConfigIsUnstable_NodesDown
and TestDontEvictIfRemainingConfigIsUnstable_NodesStopped of the
TabletReplacementITest test have been modified to cover the fixed issue.
I verified that commenting out the fix in consensus_queue.cc
makes them fail.

Change-Id: Id200ec8e562e2b21c8eef09e7b38a8d85d23239c
Reviewed-on: http://gerrit.cloudera.org:8080/8709
Reviewed-by: Mike Percy <mpe...@apache.org>
Reviewed-by: Andrew Wong <aw...@cloudera.com>
Tested-by: Alexey Serbin <aser...@cloudera.com>
---
M src/kudu/consensus/consensus_queue.cc
M src/kudu/integration-tests/tablet_replacement-itest.cc
2 files changed, 83 insertions(+), 34 deletions(-)

Approvals:
  Mike Percy: Looks good to me, approved
  Andrew Wong: Looks good to me, approved
  Alexey Serbin: Verified

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Id200ec8e562e2b21c8eef09e7b38a8d85d23239c
Gerrit-Change-Number: 8709
Gerrit-PatchSet: 9
Gerrit-Owner: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>

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