fixes #203 Remove ActiveScaffold from Models

fixes #202 - Remove activescaffold from the medias page

fixes #201 - Remove activescaffold from the domains page

fixes #207 - remove activescaffold from Parameters settings

fixes #198 - remove activescaffold from Operating systems setting page

fixes #195 - remove activescaffold from Architectures setting page

fixes #194 - remove activescaffold from partitioning table setting page

fixes broken fixtures for lookup_keys

fixes broken testfixtures/lookup_keys.yml

fixes #141 - add support to extlookup kind of queries through foreman
usage:
wget -q -O - "http://foreman/lookup?key=ntpserver&order[]=my.domain&order[]=common"
if you want it in YAML, just add:
wget -q -O - "http://foreman/lookup?key=ntpserver&order[]=my.domain&order[]=common&format=yml"