Fix svn export to better export paths from past
Fix svn export to better export paths from past

In a couple of places in the tests, svn export refers to paths that are no
longer in the current revision. Change the way I specify that I want to
export a past revision so that SVN does not complain.

git-svn-id: d4dac5d1b57f4ff5e3fed9c080589c4820ad2c03@18668 4e558342-562e-0410-864c-e07659590f8c

opensciencegrid/osg-build,matyasselmeci/osg-build,opensciencegrid/osg-build,matyasselmeci/osg-build