Joe McDonnell has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/19592 )

Change subject: IMPALA-11977: Fix Python 3 broken imports and object model 
differences
......................................................................

IMPALA-11977: Fix Python 3 broken imports and object model differences

Python 3 changed some object model methods:
 - __nonzero__ was removed in favor of __bool__
 - func_dict / func_name were removed in favor of __dict__ / __name__
 - The next() function was deprecated in favor of __next__
   (Code locations should use next(iter) rather than iter.next())
 - metaclasses are specified a different way
 - Locations that specify __eq__ should also specify __hash__

Python 3 also moved some packages around (urllib2, Queue, httplib,
etc), and this adapts the code to use the new locations (usually
handled on Python 2 via future). This also fixes the code to
avoid referencing exception variables outside the exception block
and variables outside of a comprehension. Several of these seem
like false positives, but it is better to avoid the warning.

This fixes these pylint warnings:
bad-python3-import
eq-without-hash
metaclass-assignment
next-method-called
nonzero-method
exception-escape
comprehension-escape

Testing:
 - Ran core tests
 - Ran release exhaustive tests

Change-Id: I988ae6c139142678b0d40f1f4170b892eabf25ee
Reviewed-on: http://gerrit.cloudera.org:8080/19592
Reviewed-by: Joe McDonnell <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
---
M bin/banned_py3k_warnings.txt
M testdata/bin/generate-schema-statements.py
M testdata/common/widetable.py
M tests/benchmark/report_benchmark_results.py
M tests/common/custom_cluster_test_suite.py
M tests/common/impala_connection.py
M tests/common/test_result_verifier.py
M tests/comparison/cluster.py
M tests/comparison/common.py
M tests/comparison/data_generator_mapred_common.py
M tests/comparison/db_connection.py
M tests/comparison/db_types.py
M tests/comparison/query.py
M tests/conftest.py
M tests/custom_cluster/test_admission_controller.py
M tests/custom_cluster/test_executor_groups.py
M tests/custom_cluster/test_local_catalog.py
M tests/custom_cluster/test_saml2_sso.py
M tests/custom_cluster/test_udf_concurrency.py
M tests/hs2/test_hs2.py
M tests/hs2/test_json_endpoints.py
M tests/performance/query.py
M tests/query_test/test_insert_parquet.py
M tests/shell/test_shell_commandline.py
M tests/shell/test_shell_interactive.py
M tests/statestore/test_statestore.py
M tests/stress/concurrent_select.py
M tests/stress/query_retries_stress_runner.py
M tests/util/concurrent_workload.py
M tests/util/filesystem_base.py
M tests/util/hdfs_util.py
M tests/util/ssh_util.py
32 files changed, 210 insertions(+), 153 deletions(-)

Approvals:
  Joe McDonnell: Looks good to me, approved
  Impala Public Jenkins: Verified

--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I988ae6c139142678b0d40f1f4170b892eabf25ee
Gerrit-Change-Number: 19592
Gerrit-PatchSet: 6
Gerrit-Owner: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>

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