Add test for fail on locking a non-existent file.
Add test for fail on locking a non-existent file.

Patch by: Alexander Thomas <alexander@collab.net>
(Tweaked by me.)

* subversion/tests/clients/cmdline/lock_tests.py
  (lock_non_existent_file): Added function to test failure on locking
  of non-existent file.

  (test_list): Added lock_non_existent_file to list of tests.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@854191 13f79535-47bb-0310-9956-ffa450edef68

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