[kudu-CR] [consensus] test-only option for replica replacement

["Alexey Serbin (Code Review)" <ge...@cloudera.org>]

Hello Mike Percy, Kudu Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/8889

to look at the new patch set (#3).

Change subject: [consensus] test-only option for replica replacement
......................................................................

[consensus] test-only option for replica replacement

Replica replacement: added an option to attempt Raft configuration
update even in absence of healthy majority of tablet replicas.

This option is for testing purposes: as we could see during latest load
testing, an attempt to change the configuration under such unusual
circumstances allowed for exposing some bugs.

In run-time, the option is controlled by the newly introduced flag
--raft_attempt_to_replace_replica_without_majority.  It affects both
3-4-3 and 3-2-3 replica replacement schemes.

Change-Id: I4f89b6c584296e3da5047475c5c86c4cb1118ad0
---
M src/kudu/consensus/consensus_queue.cc
M src/kudu/consensus/quorum_util-test.cc
M src/kudu/consensus/quorum_util.cc
M src/kudu/consensus/quorum_util.h
M src/kudu/consensus/raft_consensus.cc
M src/kudu/integration-tests/raft_consensus-itest.cc
M src/kudu/master/catalog_manager.cc
7 files changed, 879 insertions(+), 753 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/89/8889/3
-- 
To view, visit http://gerrit.cloudera.org:8080/8889
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I4f89b6c584296e3da5047475c5c86c4cb1118ad0
Gerrit-Change-Number: 8889
Gerrit-PatchSet: 3
Gerrit-Owner: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mp...@apache.org>