[Impala-ASF-CR] IMPALA-5413: Add a hive user for test seq writer hive compatibility.

["David Knupp (Code Review)" <ge...@cloudera.org>]

David Knupp has uploaded a new patch set (#2).

Change subject: IMPALA-5413: Add a hive user for test_seq_writer_hive_compatibility.
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IMPALA-5413: Add a hive user for test_seq_writer_hive_compatibility.

This patch includes a change to the framework to permit the passing
of a username to the run_stmt_in_hive() method in the ImpalaTestSuite
class, but retains the same default value as before.

This is to allow a test to issue a 'select count(*) from foo' query
through hive. Hive needs to set up a job to perform this query, and
HDFS write access to do so. In typical cases, the HDFS user is 'hdfs'.
however it may be necessary to change this depending on the cluster.

On a local mini-cluster, the username appears to be irrelevant, so
this won't affect locally run tests.

Tested by running the core set of tests on a local minicluster to
make sure there were no regressions. Also confirmed that the test
in question now passes on a remote physical cluster.

Change-Id: I1cc8824800e4339874b9c4e3a84969baf848d941
---
M tests/common/impala_test_suite.py
M tests/query_test/test_compressed_formats.py
2 files changed, 11 insertions(+), 4 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/46/7046/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I1cc8824800e4339874b9c4e3a84969baf848d941
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: David Knupp <dk...@cloudera.com>
Gerrit-Reviewer: Alex Behm <al...@cloudera.com>
Gerrit-Reviewer: David Knupp <dk...@cloudera.com>