(maint) install released repos even when testing nightlies
(maint) install released repos even when testing nightlies

Upgrade tests will fail if the only installed repos are the nightly repos.

mullr/puppetdb,waynr/puppetdb,puppetlabs/puppetdb,kbarber/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,kbarber/puppetdb,rbrw/puppetdb,mullr/puppetdb,waynr/puppetdb,senior/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,kbarber/puppetdb,waynr/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,waynr/puppetdb,senior/puppetdb,rbrw/puppetdb,senior/puppetdb,senior/puppetdb,kbarber/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb