OF-2409: Fix caseing of CSS identifier
In OF-2409, the DOCTYPE of the admin pages has changed to HTML 5. This apparently has the side-effect that CSS identifiers have become case sensitive.
The change in this commit fixes the issue of the build/login/clustering status information block to move back to the top-right corner of each page.
Run the unit tests in isolation
Openfire's internals have many statics that are hard to 'unset'. As a result, unit tests are very likely to affect one another.
To prevent this kind of interaction, this commit configures the unit test execution to happen in isolation, using a new for for every test.