In our build and test scripts, don't import built-in modules when in Python 3.
In our build and test scripts, don't import built-in modules when in Python 3.

* build/run_tests.py
  (): The exceptions module only needs to be imported pre-Python 3.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1742820 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion