Add regression test for an issue found by combining several small bug reports
that were sent to the list and discussed at the hackathon.

* subversion/tests/cmdline/lock_tests.py
  (lock_commit_bump): New XFail test, showing that we accidentally
    bump files during commit that shouldn't be bumped.
  (test_list): Add lock_commit_bump.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1603497 13f79535-47bb-0310-9956-ffa450edef68