[kudu-CR] [master] KUDU-2181 Raft change config request for adding a master

["Bankim Bhavsar (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, Andrew Wong, 

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

    http://gerrit.cloudera.org:8080/16321

to look at the new patch set (#2).

Change subject: [master] KUDU-2181 Raft change config request for adding a master
......................................................................

[master] KUDU-2181 Raft change config request for adding a master

Change includes:
- Hidden feature flag "--master_support_change_config" off by default
- RPC changes to add a master that initiates Raft config change
- RPC changes to report back member type(VOTER/NON_VOTER) of masters
- Initiates ChangeConfig request to add a master to the master Raft config
- Removes the cached master_addresses in catalog manager as it's no longer
  static.
- Updates the master_addresses in MasterOptions on successful update to
  master Raft config.

If the new master can be caught up from the WAL then the master
gets promoted to VOTER else it remains as NON_VOTER without master tablet
copying support.

Change-Id: I0ac7e6e55220bcb01cad0fa386daaf656258088c
---
M src/kudu/common/wire_protocol.proto
M src/kudu/consensus/raft_consensus.cc
M src/kudu/consensus/raft_consensus.h
M src/kudu/master/CMakeLists.txt
M src/kudu/master/catalog_manager.cc
M src/kudu/master/catalog_manager.h
A src/kudu/master/dynamic_multi_master-test.cc
M src/kudu/master/master.cc
M src/kudu/master/master.h
M src/kudu/master/master.proto
M src/kudu/master/master_options.cc
M src/kudu/master/master_options.h
M src/kudu/master/master_path_handlers.cc
M src/kudu/master/master_service.cc
M src/kudu/master/master_service.h
M src/kudu/master/mini_master.cc
M src/kudu/master/sys_catalog.cc
M src/kudu/mini-cluster/external_mini_cluster.cc
M src/kudu/mini-cluster/external_mini_cluster.h
M src/kudu/tools/tool_action_master.cc
20 files changed, 765 insertions(+), 43 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/21/16321/2
-- 
To view, visit http://gerrit.cloudera.org:8080/16321
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I0ac7e6e55220bcb01cad0fa386daaf656258088c
Gerrit-Change-Number: 16321
Gerrit-PatchSet: 2
Gerrit-Owner: Bankim Bhavsar <ba...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Bankim Bhavsar <ba...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)