test_MS_load.
test_MS_load.

Add a (relatively simple) set of test cases for MS_load.

pusher96/MSAT,jwookey/MSAT,pusher96/MSAT,alanfbaird/MSAT,alanfbaird/MSAT,jwookey/MSAT,pusher96/MSAT,alanfbaird/MSAT,jwookey/MSAT