sasview is marked for autoremoval from testing

[Debian testing autoremoval watch]

sasview 4.2.0~git20180309-2 is marked for autoremoval from testing on 2018-04-28

It (build-)depends on packages with these RC bugs:
893050: pyopencl: pyopencl FTBFS: ModuleNotFoundError: No module named 'pyopencl'
894526: scikit-learn: scikit-learn build depends on the removed python-imaging