Refs #9342 Add proper unit test for DensityOfStates
Refs #9342 Add unit test for IndirectTransmission
Refs #9342 Add unit test for SofQWMoments
Merge branch 'feature/9342_indirect_py_alg_testing' into develop

Refs #9342

Conflicts:
	Code/Mantid/Framework/PythonInterface/test/python/plugins/algorithms/CMakeLists.txt