Have split Usage component into its own job.

Unfortunately the job fails because there are no tests (and it expects that there should be test results to parse and display)!

http://hudson.qa.jboss.com/hudson/view/DevStudio_Trunk/job/jbosstools-3.2_trunk.component--usage/1/console

Solution: add tests if none are written, or enable/refactor them if they're not running as part of the build due to misconfiguration.