- added new method to Builds to findLatest one

To implements a overview of the latest builds.
- implements new rest method that return latest ten builds
- added new url mapping to return ten latest builds
See card https://trello.com/c/dTIaVEOu.
- extend test of build limits [skip ci]

There was a bug it deletes also old builds of all project not only of build relevant project.
See https://trello.com/c/8VocyKNW comments section.
- added overview.html that display ten latest builds

The sup steps were
- implements overview controller
- added angularjs route for overview
- added new build to e2e test data to test the new overview
- finished overview impßlementation with e2e test case

Finished complete the card https://trello.com/c/ZT6JM2ag with e2e test case.