[Impala-CR](cdh5-trunk) Make test_low_mem_limit_low_selectivity_scan faster

["Casey Ching (Code Review)" <ge...@cloudera.org>]

Casey Ching has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/2766

Change subject: Make test_low_mem_limit_low_selectivity_scan faster
......................................................................

Make test_low_mem_limit_low_selectivity_scan faster

The took ~7 mins to run on my machine. It was spending about half its
time re-creating the same data set over and over. This may also help
with the test failures during continuous integration.

All that needed to be done was to change the setup/teardown from method
level to class level. This should have no affect on the test coverage.

Change-Id: Ic874a7e9c8305bef3e16df03a807493f069e9265
---
M tests/query_test/test_kudu.py
1 file changed, 25 insertions(+), 20 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/66/2766/1
-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ic874a7e9c8305bef3e16df03a807493f069e9265
Gerrit-PatchSet: 1
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Casey Ching <ca...@cloudera.com>