Re #9221. Implemented setMatrixWorkspace methods
Re #9221. Corrected unit tests
Re #9221. A doxygen comment fix
Re #9221. Fix the compiler warnings.
Fix doxygen warning in setMatrixWorkspace method.

Refs #9221
Merge branch 'master' into feature/9221_comptonprofile_setmatrixworkspace
Merge remote-tracking branch 'origin/feature/9221_comptonprofile_setmatrixworkspace'