Use the new "sexy" validations for Sweep model
Use the new "sexy" validations for Sweep model

As pointed out by Rubocop. This resolves all of the cops for this file.

Change-Id: Ifb063928e8e58aed32b990844b9a4c805ba370dc

diffux/diffux,kalw/diffux,diffux/diffux,diffux/diffux,kalw/diffux,kalw/diffux