Move sandbox handling from run_one_test() to TestRunner.run().
Move sandbox handling from run_one_test() to TestRunner.run().

* subversion/tests/cmdline/svntest/main.py (TestRunner.run): Manage
  the sandbox (if needed) within this method.  Now the method doesn't
  need an argument.  (Sandbox-handling code moved from
  run_one_test().)

  (run_one_test): Don't handle sandbox here anymore.  Removed local
  variable "tc".


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@859314 13f79535-47bb-0310-9956-ffa450edef68

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