This adds exception handling to the Kibana Selenium tests
to address the test failures due to TimeoutExceptions when
the dashboard loads slowly. Only TimeoutExceptions are handled
so if there is an issue with the page itself an error will still
cause the gate to fail as intended. When a TimeoutException
occurs an error message is logged and a screenshot is taken
of the current page.
Change-Id: I16cd3a61ffce2e5fdc39bd7731cc068b8a6ec41f
1bf24051c5