Move Conference contact details to Contact

spec/factories/conferences.rb

@@ -4,9 +4,7 @@ FactoryGirl.define do
   factory :conference do
     title 'The dog and pony show'
     sequence(:short_title) { |n| "dps#{n}14" }
-    social_tag 'dps14'
     timezone 'Amsterdam'
-    contact_email 'admin@example.com'
     start_date { Date.today }
     end_date { 6.days.from_now }
     registration_start_date { 3.days.from_now }