Hao Hao has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/14425 )

Change subject: KUDU-2971 p1: add subprocess module
......................................................................

KUDU-2971 p1: add subprocess module

Utility classes exist that allow for IPC over stdin/stdout via protobuf
and JSON-encoded protobuf. This commit moves those classes into their
own directory so it can be reused by other subprocesses.

Following commits can then extend it to support concurrent communications
with subprocess. There are no functional changes in this patch.

Change-Id: If73e27772e1897a04f04229c4906a24c61e361f2
Reviewed-on: http://gerrit.cloudera.org:8080/14425
Tested-by: Kudu Jenkins
Reviewed-by: Andrew Wong <[email protected]>
---
M CMakeLists.txt
A src/kudu/subprocess/CMakeLists.txt
A src/kudu/subprocess/subprocess_protocol.cc
A src/kudu/subprocess/subprocess_protocol.h
M src/kudu/tools/CMakeLists.txt
M src/kudu/tools/kudu-tool-test.cc
M src/kudu/tools/tool_action_common.cc
M src/kudu/tools/tool_action_common.h
M src/kudu/tools/tool_action_test.cc
9 files changed, 374 insertions(+), 265 deletions(-)

Approvals:
  Kudu Jenkins: Verified
  Andrew Wong: Looks good to me, approved

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: If73e27772e1897a04f04229c4906a24c61e361f2
Gerrit-Change-Number: 14425
Gerrit-PatchSet: 6
Gerrit-Owner: Hao Hao <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Attila Bukor <[email protected]>
Gerrit-Reviewer: Hao Hao <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)

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