Julien Danjou 3981a3a300 Switch to a custom NotImplemented error
Some code in the drivers might actually raise the standard
NotImplemented error, and that would be a bug to skip a test if that was
the case. In that case we want the test to fail.

So let's switch to a custom exception that is used to skip the test if
it's raised.

Change-Id: Ideafee0b1f008ff32724fb98d6a477bd3976104d
2014-09-12 11:20:17 +02:00
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