[formrecognizer] arch board feedback renames#12207

Merged

kristapratico merged 2 commits intoAzure:masterfrom kristapratico:rename-params

Jun 26, 2020

+86-85

Commits on Jun 25, 2020

renames requested_on -> training_started_on and completed_on -> training_completed_on
kristapratico
committed

Commits on Jun 26, 2020

update docstring
kristapratico
committed