Previously it had to be executed serially because it modified tables in
the functional database.
This change separates out tests that use temporary tables and runs those
in a unique_database.
Testing:
Ran locally in a loop with parallelism of 4 for a while.
Change-Id: I2f62ede90f619b8cebbb1276bab903e7555d9744
Reviewed-on: http://gerrit.cloudera.org:8080/9022
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins