This commit turns on events processing by default. The default
polling interval is set as 1 second which can be overrriden by
setting hms_event_polling_interval_s to non-default value.
When the event polling turned on by default this patch also
moves the test_event_processing.py to tests/metadata instead
of custom cluster test. Some tests within test_event_processing.py
which needed non-default configurations were moved to
tests/custom_cluster/test_events_custom_configs.py.
Additionally, some other tests were modified to take into account
the automatic ability of Impala to detect newly added tables
from hive.
Testing done:
1. Ran exhaustive tests by turning on the events processing multiple
times.
2. Ran exhaustive tests by disabling events processing.
3. Ran dockerized tests.
Change-Id: I9a8b1871a98b913d0ad8bb26a104a296b6a06122
Reviewed-on: http://gerrit.cloudera.org:8080/17612
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Reviewed-by: Quanlong Huang <huangquanlong@gmail.com>
