Use some sandbox methods to simplify some of the lock tests.
Use some sandbox methods to simplify some of the lock tests.

(I got partway through the file before tiring..)

* subversion/tests/cmdline/lock_tests.py:
  (lock_file, commit_file_keep_lock, commit_propchange, break_lock,
      steal_lock, examine_lock, handle_defunct_lock, enforce_lock,
      update_while_needing_lock, defunct_lock, deleted_path_lock,
      lock_unlock, deleted_dir_lock, lock_status): use sbox.ospath and
    sbox.simple_* as appropriate.

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