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.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion