Change DUNS validation scenarios to always run
Change DUNS validation scenarios to always run

Scenarios which check our integration with the D&B DUNS service will now
run even if no framework is open.

I think this is better because I think it would be good to know of any
issues as soon as possible.

alphagov/digitalmarketplace-functional-tests,alphagov/digitalmarketplace-functional-tests,alphagov/digitalmarketplace-functional-tests