Alexey Serbin has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/18132 )

Change subject: [rebalancer_tool] refactor on IgnoredTserversRunner
......................................................................

[rebalancer_tool] refactor on IgnoredTserversRunner

ClusterInfo::tservers_to_empty is not needed to be populated when
'BuildClusterInfo' called, we use it in two cases:
- print replica count about tservers_to_empty.
- get replicas running on tservers_to_empty (used in IgnoredTserverRunner).
But 'BuildClusterInfo" could be called in many places.

This patch removed it from ClusterInfo so we could get the information
only when needed.

Change-Id: I4e51349d12fffb54458142169b9e7789c8d3987c
Reviewed-on: http://gerrit.cloudera.org:8080/18132
Tested-by: Alexey Serbin <[email protected]>
Reviewed-by: Alexey Serbin <[email protected]>
---
M src/kudu/rebalance/rebalance_algo.h
M src/kudu/rebalance/rebalancer.cc
M src/kudu/rebalance/rebalancer.h
M src/kudu/tools/rebalancer_tool.cc
M src/kudu/tools/rebalancer_tool.h
5 files changed, 106 insertions(+), 83 deletions(-)

Approvals:
  Alexey Serbin: Looks good to me, approved; Verified

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I4e51349d12fffb54458142169b9e7789c8d3987c
Gerrit-Change-Number: 18132
Gerrit-PatchSet: 4
Gerrit-Owner: Yifan Zhang <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Yifan Zhang <[email protected]>

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