Make REVPREFIX to conform current subject pattern of svn-breakage by default.
Make REVPREFIX to conform current subject pattern of svn-breakage by default.

* tools/test-scripts/svntest/svntest-config.sh
    (REVPREFIX): Eat 'branches/' away from REVPREFIX.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@850638 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion