TT-1606: As the clever questions cookie will not exist in prod yet the main routes should be there by default
TT-1606: As the clever questions cookie will not exist in prod yet the
main routes should be there by default

The main routes will always be in play. In dev environment the cookie
will be present causing the variant routes to come into play. This will
keep variant tests passing but disallow the variant route to be accessed
in prod.

Authors: 945c721b8af12730377f1919370510e556f78e1f@jakubmiarka

alphagov/verify-frontend,alphagov/verify-frontend,alphagov/verify-frontend,alphagov/verify-frontend