Bring back UiBinderUtilTest after fixing IE6 failure in
testDetach. Was checking for null parentNode instead of parentElement,
and on ie6 you still have the former after the latter dumps you.  Test
was rolled back in svn trunk@6318.

http://gwt-code-reviews.appspot.com/136802


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7527 8db76d5a-ed1c-0410-87a9-c151d255dfc7