Adding a feature that allows users to define compile properties on test methods in GwtTestCases.  A synthetic module will be created using the test module plus the specified properties.

Patch by: pmuetschard   	
Review by: jlabanca



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6425 8db76d5a-ed1c-0410-87a9-c151d255dfc7