fix OOIION-1297: re-enable tests that were skipped

Tests that had been skipped (4 out of 10) are re-enabled now to see how they perform on the buildbots. (Note that all these tests run consistently fine locally).

Please see https://jira.oceanobservatories.org/tasks/browse/OOIION-1297 for details.

@edwardhunter / @jamie-cyber1 please review