Add and tweak some tests for issue #2381.
Add and tweak some tests for issue #2381.

* subversion/tests/cmdline/commit_tests.py
  (commit_multiple_wc): Rename to ...
  (commit_multiple_wc_nested): ... this, because it tests the case where
   two working copies are nested. Also change this test to expect the
   commit to succeed, which is the goal of issue #2381.
  (commit_multiple_wc): New test, like commit_multiple_wc_nested, except
   that working copies are not nested. Also expects a commit from multiple
   working copies to succeed.
  (commit_multiple_wc_multiple_repos): New test which tries to commit
   from two working copies which do not come from the same repository.
   The commit is expected to fail, because commits to multiple repositories
   are outside the scope of issue #2381.
  (test_list): Track renamed test and add the new tests.
   Mark commit_multiple_wc_nested and commit_multiple_wc as XFail,
   because issue #2381 is still work in progress.

Patch by: HuiHuang <yellow.flying@yahoo.com.cn>
(tweaked by me)

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