ra_serf: Fix authz tests 1 and 12. Fetch the UUID of the repository on the  target url and not on the root url of the repositoy as that may not be readable.
ra_serf: Fix authz tests 1 and 12. Fetch the UUID of the repository on the 
target url and not on the root url of the repositoy as that may not be readable.

* subversion/libsvn_ra_serf/serf.c:
  (svn_ra_serf__get_uuid): use session url, not repo root url, to fetch the 
   repository-uuid property.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@871538 13f79535-47bb-0310-9956-ffa450edef68

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