Adding binary STAPLE1 and STAPLE2 images

Previous test input image had multiple values from Resampling, these
new images are now binary. The STAPLE algorithm is faster with these
fewer classes.

Baseline needs to be updated too.

Change-Id: Ia199c62cddc12c119434ec5fa92c3e3b320d2ad9
Merge topic 'SIMPLEITK-494_ReduceLengthyTests' into next

a49c8961 Adding binary STAPLE1 and STAPLE2 images