Remove some deprecated calls to svn_ra_open3().
Remove some deprecated calls to svn_ra_open3().

* subversion/svnsync/main.c
  (do_initialize, initialize_cmd, open_source_session, synchronize_cmd,
   copy_revprops_cmd, info_cmd): Use svn_ra_open4().


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@990812 13f79535-47bb-0310-9956-ffa450edef68

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