Add XS-Testsuite in debian/control

Some uploads may happen from trusty, without dpkg-source adding the tag
automatically for you.
releasing package ubuntu-developer-tools-center version 0.0.2.2
Fix coverage report to reflect reality

* Ensure we don't import any udtc module before coverage is enabled
* Fix a bug while reloading the loader framework module which erased the
  coverage report for those files.
Remove unused imports