[kudu-CR] [master] support turn on/off auto rebalancer at runtime

["Yuqi Du (Code Review)" <ge...@cloudera.org>]

Hello Tidy Bot, Yingchun Lai, Kudu Jenkins, 

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

    http://gerrit.cloudera.org:8080/18679

to look at the new patch set (#14).

Change subject: [master] support turn on/off auto rebalancer at runtime
......................................................................

[master] support turn on/off auto rebalancer at runtime

kudu-master has supported auto-rebalancer, but it must be decided whether
enable it before kudu master starting.

This patch supports to use gflag --auto_rebalancing_enabled to control
whether turn on/off auto-rebalancer when running.

Change-Id: Ifbcea6392b783843f89e019f1141dd8905366de5
---
M src/kudu/master/auto_rebalancer.cc
M src/kudu/master/auto_rebalancer.h
M src/kudu/master/catalog_manager.cc
M src/kudu/master/catalog_manager.h
M src/kudu/util/threadpool-test.cc
M src/kudu/util/threadpool.cc
M src/kudu/util/threadpool.h
7 files changed, 188 insertions(+), 102 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/79/18679/14
-- 
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ifbcea6392b783843f89e019f1141dd8905366de5
Gerrit-Change-Number: 18679
Gerrit-PatchSet: 14
Gerrit-Owner: Yuqi Du <sh...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)
Gerrit-Reviewer: Yingchun Lai <ac...@gmail.com>
Gerrit-Reviewer: Yuqi Du <sh...@gmail.com>