(maint) Fix trusted facts tests
(maint) Fix trusted facts tests

Puppet just changed the 'domainname' trusted fact to 'domain'; this
fixes our tests to work with it. 
kbarber/puppetdb,kbarber/puppetdb,senior/puppetdb,senior/puppetdb,waynr/puppetdb,rbrw/puppetdb,senior/puppetdb,rbrw/puppetdb,kbarber/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,waynr/puppetdb,kbarber/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb,waynr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,waynr/puppetdb,mullr/puppetdb,senior/puppetdb,mullr/puppetdb