python packages scikit-learn: 0.16.1 -> 0.17b1

Some tests in scikit-learn 0.16.1 fail with the new scipy 0.16 package.
This is known upstream and should be fixed in the next release.
https://github.com/scikit-learn/scikit-learn/issues/5045

This commit disables the tests until the next scikit-learn release.