use :full_conference factory in the conference view specs

spec/views/admin/conference/index.html.haml_spec.rb

@@ -1,10 +1,13 @@
 require 'spec_helper'
 
 describe 'admin/conference/index' do
+  let(:conference) { create(:conference, title: 'openSUSE Conference 2016') }
+  let(:second_conference) { create(:conference) }
+
   it 'renders all conference names with links' do
-    assign(:conferences, [create(:conference, title: 'openSUSE'), create(:conference)])
+    assign(:conferences, [conference, second_conference])
     render
-    expect(rendered).to include('openSUSE')
-    expect(rendered).to include('The dog and pony show')
+    expect(rendered).to include('openSUSE Conference 2016')
+    expect(rendered).to include(second_conference.title)
   end
 end