Fixes wrong variable name in *query nodes*
Fixes wrong variable name in *query nodes*

* Old variable name puppetdb_{host,port} was still used

danieldreier/puppet-puppetdbquery,pyther/puppet-puppetdbquery,ccin2p3/puppet-puppetdbquery,gcmalloc/puppet-puppetdbquery,unki/puppet-puppetdbquery,dalen/puppet-puppetdbquery