Suppress sandbox creation for tests that are going to be skipped.
Suppress sandbox creation for tests that are going to be skipped.

* subversion/tests/cmdline/svntest/testcase.py (Skip.need_sandbox): If
  self.cond is true, then return false instead of delegating to
  self.test_case.

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