svntest: Fix an error handling bug when running 'svnadmin load'.
svntest: Fix an error handling bug when running 'svnadmin load'.

* subversion/tests/cmdline/svntest/actions.py
  (run_and_verify_load): Check actual error output "errput", rather
   than expected error output "expected_stderr", when deciding whether
   to call compare_and_display_lines().


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@866784 13f79535-47bb-0310-9956-ffa450edef68

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