rhbz1080770 - Fix url handling in version group page.

Make sure 'Add Project' buttons redirect to the settings page.
Move 'is-active' css classes in accordance with the new asset component scripts.
Clean up the test framework

- Designate a "test plan"
- Convert/remove Concordion tests (some still used in zanata-war)
- Remove many superfluous suite files (flat list)
Also,
- Fix broken version group test
- Move the test structure to its own package
Merge pull request #435 from zanata/rhbz1080770

rhbz1080770 - Fix url handling in version group page.
fix random test failure
Merge pull request #436 from zanata/fix-test

fix random test failure
Merge pull request #429 from zanata/teststructure-upgrade

Clean up the test framework
Convert to assertj and clean up Account tests