Tweak a switch test to avoid a spurious XFail over ra_serf.
Tweak a switch test to avoid a spurious XFail over ra_serf.

* subversion/tests/cmdline/switch_tests.py

  (forced_switch_failures): Account for some perfectly valid ra_serf
   differences.

  (test_list): Remove XFail from forced_switch_failures.

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