DM-1072 Enable forced plugins for already defined SFM plugins

Also, Change list of default plugins for TestForced.
Fixes to testForced.py to minimally test the new plugins
Bugfix to handle setting result objects on Fail.

Added tests for Default plugins.  Very approximate for fluxes, more exact for TransformedShape/Centroid
Merge branch 'u/pgee/DM-1072'