Eng 7155 new geb vmc automation

This is the final version (for now) of the GEB tests of the new VMC, with lots of tests of the DB Monitor and SQL Query pages (including the query tests from the old GEB tests of the old Web Studio UI); no tests of the Schema page, nor of any future pages (e.g. Admin) are included (for now).
There is an IE driver; I have not tried it, and my experience with the difficulties of Safari and HtmlUnit (headless) does not make me optimistic that it will work easily (and I'm not sure if any of this would run on Windows); though I agree we should get all of these working eventually.