Change TckCompileTestCase to not extend GWTTestCase. It wasn't running as
a GWTTestCase before because getModuleName() was returning null, but that's
just a more confusing way to say the same thing.

Review at http://gwt-code-reviews.appspot.com/1798807

Review by: nchalko@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11209 8db76d5a-ed1c-0410-87a9-c151d255dfc7