Replace legacy facts and use fact hash

... because the latest lint no longer allows usage of legacy facts and
top scope fact.

Change-Id: Iebdb33dd18a8f8d18840ff3e5f4608f021a78bfa

spec/classes/glance_spec.rb

@@ -37,7 +37,7 @@ describe 'glance' do
       end
 
       it_configures 'glance'
-      it_configures "glance #{facts[:osfamily]}"
+      it_configures "glance #{facts[:os]['family']}"
     end
   end
 end