ViewTestAlg now dumps view data and parents

Benjamin Michael Wynnerequested to merge
bwynne/athena:ViewDataDump into master

Made ViewTestAlg more useful as a debugging tool by having it dump out the contents of the view it is running in.

This uses the SG::View::dump() method, which I've changed the output formatting for and fixed some bugs. Also added ViewTestAlg to the view inheritance test so you can see the dump() output working for parent views.

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