[kudu-CR] KUDU-1189 if not set, use timestamp from first server

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

Hello Kudu Jenkins,

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

    http://gerrit.cloudera.org:8080/5143

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

Change subject: KUDU-1189 if not set, use timestamp from first server
......................................................................

KUDU-1189 if not set, use timestamp from first server

KUDU-1189 On reads at a snapshot that touch multiple tablets, without
  the user setting a timestamp, use the timestamp from the first server
  for following scans

For a READ_AT_SNAPSHOT scan operation with no snapshot timestamp
specified, store the snapshot timestamp returned from the first tablet
server into the scan configuration object.  Use it for the rest of read
operations performed at other tablet servers in the context of the same
scan operation.

This brings more consistency for read operations in READ_AT_SNAPSHOT
mode where the snapshot timestamp is not specified explicitly.

Change-Id: I2ac708e38b8a80834f7d54eca294517cbfb06ec6
---
M src/kudu/client/client.h
M src/kudu/client/scanner-internal.cc
M src/kudu/integration-tests/consistency-itest.cc
3 files changed, 178 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/43/5143/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I2ac708e38b8a80834f7d54eca294517cbfb06ec6
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: David Ribeiro Alves <dr...@apache.org>
Gerrit-Reviewer: Jean-Daniel Cryans <jd...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>