[Qt] Unreviewed gardening. Unskip now passing compositing tests.

* platform/qt-5.0-wk1/TestExpectations:
* platform/qt-5.0-wk2/TestExpectations:
* platform/qt/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145698 268f45cc-cd09-0410-ab3c-d52691b4dbfc