Keep track of TCK coverage.
Run the non TCK test to ensure there is always at least one test.

[JSR 303 TCK Result] WARNING only 191 of 258 (74.03%) TCK Tests Covered.
[JSR 303 TCK Result] 151 of 257 (58.75%) Pass with 32 Failures and 7 Errors.

Review at http://gwt-code-reviews.appspot.com/1575803

Review by: rjrjr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10707 8db76d5a-ed1c-0410-87a9-c151d255dfc7