If a test skips, clean up its sandbox.
If a test skips, clean up its sandbox.

Previously only tests whose converted results indicated a pass had
their sandboxes cleaned up.

* subversion/tests/cmdline/svntest/main.py (TestRunner.run): Only omit
  sandbox cleanup for tests that result in a failure (not tests that
  skip).

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