[Impala-CR](cdh5-2.5.0_5.7.0) Fix test_exchange_delays in S3 build

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

Tim Armstrong has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/2421

Change subject: Fix test_exchange_delays in S3 build
......................................................................

Fix test_exchange_delays in S3 build

Scans were slower to start in S3, which led to the exchange delay test
queries completing successfully in some cases.

Add MAYBE_CATCH option that allows expressing that either a specific
error can occur, or the query can complete successfully.

Change-Id: Iefd8631a2139b4dbc4502cf851fc2d16279d731f
---
M testdata/workloads/functional-query/queries/QueryTest/exchange-delays.test
M tests/common/impala_test_suite.py
M tests/util/test_file_parser.py
3 files changed, 9 insertions(+), 5 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/21/2421/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iefd8631a2139b4dbc4502cf851fc2d16279d731f
Gerrit-PatchSet: 1
Gerrit-Project: Impala
Gerrit-Branch: cdh5-2.5.0_5.7.0
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>