[Impala-CR](cdh5-trunk) Clean up Python test import statements

["Taras Bobrovytsky (Code Review)" <ge...@cloudera.org>]

Hello Tim Armstrong,

I'd like you to reexamine a change.  Please visit

    http://gerrit.cloudera.org:8080/3444

to look at the new patch set (#2).

Change subject: Clean up Python test import statements
......................................................................

Clean up Python test import statements

Many of our test scripts have import statements that look like
"from xxx import *". It is a good practice to explicitly name what
needs to be imported. This commit implements this practice. Also,
unused import statements are removed.

Change-Id: I6a33bb66552ae657d1725f765842f648faeb26a8
---
M tests/authorization/test_grant_revoke.py
M tests/beeswax/impala_beeswax.py
M tests/catalog_service/test_catalog_service_client.py
M tests/catalog_service/test_hms_failure.py
M tests/catalog_service/test_large_num_partitions.py
M tests/common/base_test_suite.py
M tests/common/custom_cluster_test_suite.py
M tests/common/failure_injector.py
M tests/common/impala_cluster.py
M tests/common/impala_connection.py
M tests/common/impala_service.py
M tests/common/impala_test_suite.py
M tests/common/skip.py
M tests/common/test_dimensions.py
M tests/common/test_result_verifier.py
M tests/common/test_vector.py
M tests/comparison/db_connection.py
M tests/comparison/leopard/controller.py
M tests/comparison/leopard/front_end.py
M tests/comparison/leopard/job.py
M tests/comparison/leopard/report.py
M tests/comparison/leopard/schedule_item.py
M tests/comparison/query.py
M tests/custom_cluster/test_admission_controller.py
M tests/custom_cluster/test_alloc_fail.py
M tests/custom_cluster/test_breakpad.py
M tests/custom_cluster/test_delegation.py
M tests/custom_cluster/test_hdfs_fd_caching.py
M tests/custom_cluster/test_insert_behaviour.py
M tests/custom_cluster/test_legacy_joins_aggs.py
M tests/custom_cluster/test_parquet_max_page_header.py
M tests/custom_cluster/test_permanent_udfs.py
M tests/custom_cluster/test_query_expiration.py
M tests/custom_cluster/test_s3a_access.py
M tests/custom_cluster/test_scratch_disk.py
M tests/custom_cluster/test_session_expiration.py
M tests/custom_cluster/test_spilling.py
M tests/data_errors/test_data_errors.py
M tests/experiments/test_process_failures.py
M tests/experiments/test_targeted_perf.py
M tests/failure/test_failpoints.py
M tests/metadata/test_compute_stats.py
M tests/metadata/test_ddl.py
M tests/metadata/test_ddl_base.py
M tests/metadata/test_explain.py
M tests/metadata/test_hdfs_encryption.py
M tests/metadata/test_hdfs_permissions.py
M tests/metadata/test_hidden_files.py
M tests/metadata/test_hms_integration.py
M tests/metadata/test_last_ddl_time_update.py
M tests/metadata/test_load.py
M tests/metadata/test_metadata_query_statements.py
M tests/metadata/test_partition_metadata.py
M tests/metadata/test_recover_partitions.py
M tests/metadata/test_set.py
M tests/metadata/test_show_create_table.py
M tests/metadata/test_stale_metadata.py
M tests/metadata/test_views_compatibility.py
M tests/performance/query_exec_functions.py
M tests/performance/query_executor.py
M tests/performance/scheduler.py
M tests/performance/workload.py
M tests/performance/workload_runner.py
M tests/query_test/test_aggregation.py
M tests/query_test/test_analytic_tpcds.py
M tests/query_test/test_avro_schema_resolution.py
M tests/query_test/test_cancellation.py
M tests/query_test/test_chars.py
M tests/query_test/test_compressed_formats.py
M tests/query_test/test_decimal_casting.py
M tests/query_test/test_decimal_queries.py
M tests/query_test/test_delimited_text.py
M tests/query_test/test_exprs.py
M tests/query_test/test_hash_join_timer.py
M tests/query_test/test_hbase_queries.py
M tests/query_test/test_hdfs_caching.py
M tests/query_test/test_hdfs_fd_caching.py
M tests/query_test/test_insert.py
M tests/query_test/test_insert_parquet.py
M tests/query_test/test_insert_permutation.py
M tests/query_test/test_join_queries.py
M tests/query_test/test_kudu.py
M tests/query_test/test_limit.py
M tests/query_test/test_mem_usage_scaling.py
M tests/query_test/test_multiple_filesystems.py
M tests/query_test/test_nested_types.py
M tests/query_test/test_partitioning.py
M tests/query_test/test_queries.py
M tests/query_test/test_query_mem_limit.py
M tests/query_test/test_query_opts.py
M tests/query_test/test_runtime_filters.py
M tests/query_test/test_scanners.py
M tests/query_test/test_sort.py
M tests/query_test/test_timezones.py
M tests/query_test/test_tpcds_queries.py
M tests/query_test/test_tpch_nested_queries.py
M tests/query_test/test_tpch_queries.py
M tests/query_test/test_udfs.py
M tests/shell/test_shell_commandline.py
M tests/shell/test_shell_interactive.py
M tests/statestore/test_statestore.py
M tests/stress/test_ddl_stress.py
M tests/stress/test_mini_stress.py
M tests/unittests/test_file_parser.py
M tests/unittests/test_result_verifier.py
M tests/util/compute_table_stats.py
M tests/util/hdfs_util.py
M tests/util/plugin_runner.py
M tests/util/s3_util.py
M tests/util/test_file_parser.py
M tests/verifiers/metric_verifier.py
M tests/verifiers/test_verify_metrics.py
112 files changed, 381 insertions(+), 524 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/44/3444/2
-- 
To view, visit http://gerrit.cloudera.org:8080/3444
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I6a33bb66552ae657d1725f765842f648faeb26a8
Gerrit-PatchSet: 2
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Taras Bobrovytsky <tb...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>