Enable running the tests with the jsvn executables. 
Enable running the tests with the jsvn executables. 

* Patch by: Alexander Sinyushkin <Alexander.Sinyushkin@svnkit.com>
            me (some tweaks)

* subversion/tests/cmdline/svntest/main.py
  (global): add .bat extension, 
  (usage, run_tests): New --use-jsvn option.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@867890 13f79535-47bb-0310-9956-ffa450edef68

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