[issue17883] Fix buildbot testing of Tkinter

[Zachary Ware]

Zachary Ware added the comment:

I'll leave this open until the buildbots prove happy.

I did make a couple extra changes to the patch to TclTest.testLoadWithUNC to make a couple of skip conditions actually report a skip instead of just returning, and to remove a superfluous 'import sys'.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17883>
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