fixes theforeman#1691 - allow searching for fact values for hosts ins…

…ide a hostgroup

app/models/fact_value.rb

@@ -1,11 +1,13 @@
 class FactValue < Puppet::Rails::FactValue
   belongs_to :host #ensures we uses our Host model and not Puppets
   delegate :name, :to => :fact_name
+  has_many :hostgroup, :through => :host
 
   scoped_search :on => :value, :in_key=> :fact_name, :on_key=> :name, :rename => :facts, :complete_value => true
   scoped_search :on => :value, :default_order => true
   scoped_search :in => :fact_name, :on => :name, :complete_value => true, :alias => "fact"
   scoped_search :in => :host, :on => :name, :rename => :host, :complete_value => true
+  scoped_search :in => :hostgroup, :on => :name, :rename => :"host.hostgroup", :complete_value => true
 
   scope :no_timestamp_facts, :include => [:fact_name],
               :conditions => ["fact_names.name <> ?",:_timestamp]