fix converge_by usage
fix converge_by usage

in the first two cases the work done by converge_by is entirely
done by idempotent sub resources.  in the second case the converge_by
sets the resources as being updated, setting updated_by_last_action
is redundant.

cwjohnston/runit,Altiscale/runit,jkeiser/runit,Altiscale/runit,boldfield/runit,7bfa689ac3c4be50f8ba6c1ea8c5f316/runit,NickLaMuro/runit,NickLaMuro/runit,Demandbase/db-runit,7bfa689ac3c4be50f8ba6c1ea8c5f316/runit,Demandbase/db-runit,boldfield/runit,wk8/runit,7bfa689ac3c4be50f8ba6c1ea8c5f316/runit,cwjohnston/runit,wk8/runit,jkeiser/runit,ai-traders/runit,boldfield/runit,ai-traders/runit,Altiscale/runit,ai-traders/runit,hw-cookbooks/runit,wk8/runit,jkeiser/runit,cwjohnston/runit,hw-cookbooks/runit,hw-cookbooks/runit,NickLaMuro/runit,Demandbase/db-runit