Fixed _log_console_output call on failure

_log_console_output is defined in tempest.scenario.manager.Manager but
the test class inherited from BaseTestCase that doesn't have it. So
whenever a test failure occurs, we don't log console output, which may
be handy when debugging gate issues.

Change-Id: I48701da8714c9e483401fd1ba987e4f2bef5bd23
Related-Bug: #1742936
1 file changed