[Impala-ASF-CR] IMPALA-5239: transfer reservations between trackers

["Tim Armstrong (Code Review)" <ge...@cloudera.org>]

Tim Armstrong has uploaded a new patch set (#3).

Change subject: IMPALA-5239: transfer reservations between trackers
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IMPALA-5239: transfer reservations between trackers

This is a primitive needed to implement claiming and distribution
of initial reservations. It supports transferring reservation between
any two ReservationTrackers under the same query.

Testing:
* Added a test that exercises transfer between trackers at different
  levels and with different relationships.

Change-Id: I21f008abaf1aa4fcd2d854769a603b97589af3b3
---
M be/src/runtime/bufferpool/reservation-tracker-test.cc
M be/src/runtime/bufferpool/reservation-tracker.cc
M be/src/runtime/bufferpool/reservation-tracker.h
3 files changed, 243 insertions(+), 37 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/08/6708/3
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I21f008abaf1aa4fcd2d854769a603b97589af3b3
Gerrit-PatchSet: 3
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>