Add a test to RequestFactoryInterfaceValidator that the findFoo() domain
method is static.
http://code.google.com/p/google-web-toolkit/issues/detail?id=6428
Patch by: bobv
Review by: rjrjr
Reported by: zundel

Review at http://gwt-code-reviews.appspot.com/1453803


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10258 8db76d5a-ed1c-0410-87a9-c151d255dfc7