messaging: add erlang_cookie parameter

We updated puppetlabs-rabbitmq to latest stable version, so we need to
set erlang_cookie parameter.
Also, we set it as required without default value so we ensure all
deployments need to configure it in the data.

Change-Id: I1fba5d7277ec54281913f1a30d88649cd3c5b17b

spec/classes/cloud_messaging_spec.rb

@@ -27,6 +27,7 @@ describe 'cloud::messaging' do
         :cluster_node_type => 'disc',
         :rabbit_names      => ['foo','boo','zoo'],
         :rabbit_password   => 'secrete',
+        :erlang_cookie     => 'MY_COOKIE',
         :rabbitmq_ip       => '10.0.0.1',
       }
     end
@@ -39,6 +40,7 @@ describe 'cloud::messaging' do
           :wipe_db_on_cookie_change => true,
           :cluster_node_type        => params[:cluster_node_type],
           :node_ip_address          => params[:rabbitmq_ip],
+          :erlang_cookie            => params[:erlang_cookie],
           :port                     => '5672',
         )
     end
@@ -102,6 +104,10 @@ describe 'cloud::messaging' do
       { :osfamily => 'RedHat' }
     end
 
+    let :params do
+      { :erlang_cookie => 'MY_COOKIE' }
+    end
+
     it_configures 'openstack messaging'
 
     it 'should create rabbitmq binaries symbolic links' do