Following up on r954850, allow running the tests in parallel again.
Following up on r954850, allow running the tests in parallel again.

* subversion/tests/cmdline/svntest/main.py
  (run_tests): Remove parallel and use options.parallel instead.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@954892 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion