Fix unit tests for latest puppet version

It's required to have title in 'not contain' test.

Change-Id: I64857817bb0ccae98d80d5eb76bc8c5e10c5f3fc
(cherry picked from commit 6c98032ea5)

spec/defines/openstacklib_messaging_rabbitmq_spec.rb

@@ -78,7 +78,7 @@ describe 'openstacklib::messaging::rabbitmq' do
         params.merge!( :manage_vhost => false )
       end
 
-      it { is_expected.not_to contain_rabbitmq_vhost }
+      it { is_expected.not_to contain_rabbitmq_vhost('/') }
     end
 
   end