filter.py tests fail on Python 3.7 but pass on Python 2.7, 3.5, and 3.6

[cclauss]

https://travis-ci.org/CellProfiler/centrosome/jobs/435518729#L2494

[AetherUnbound]

This is likely why: https://docs.python.org/3/library/exceptions.html#StopIteration

Changed in version 3.7: Enable PEP 479 for all code by default: a StopIteration error raised in a generator is transformed into a RuntimeError.

[cclauss]

So how do we fix this?

[AetherUnbound]

I think the best solution might be to replace the home-brewed permuation algorithm with a comparable numpy method, and ensure that all of the functionality is retained. Then we can just drop this block entirely.