Improve the robustness of many locking tests.
Improve the robustness of many locking tests.

* subversion/tests/cmdline/lock_tests.py
  (All over the file): Check that the output of lock and unlock commands is
  what was expected instead of just accepting any output.
  Remove an commented out line.

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