Additional representative breps models for tests

[shimwell]

Currently there is a model of two cubes that share a flat surface in the tests suite
https://github.com/makeclean/occ_faceter/blob/master/src/test/gluedCompSolid.brep

I'm keen to add a few more geometries that will allow more tests to be carried out
A rectangle cut into two parts with a circular surface
A rectangle cut into two parts with a spline surface
A simple reactor geometry (400kb) if that is ok?

[shimwell]

Perhaps throw this one into the mix as well

It has splines, circles, straight sections