Stop setting a default cookie

Like passwords, secret cookies shouldn't have defaults. This
change removes the default and hard fails when a value is needed and
not set.

README.md

@@ -222,6 +222,7 @@ RabbitMQ Environment Variables in rabbitmq_env.config
 ####`erlang_cookie`
 
 The erlang cookie to use for clustering - must be the same between all nodes.
+This value has no default and must be set explicitly if using clustering.
 
 ###`key_content`
 

lib/puppet/type/rabbitmq_erlang_cookie.rb

@@ -3,20 +3,6 @@
 
   newparam(:path, :namevar => true)
 
-  validate do
-    # This does pre-validation on the content property and force parameter.
-    # The intent is to simulate the prior behavior to the invention of this
-    # type (see https://github.com/puppetlabs/puppetlabs-rabbitmq/blob/4.1.0/manifests/config.pp#L87-L117)
-    # where validation occurs before the catalog starts being applied.
-    # This prevents other resources from failing after attempting to apply
-    # this resource and having it fail due to the force parameter being
-    # set to false.
-    is = (File.read(self[:path]) if File.exists?(self[:path])) || ''
-    should = self[:content]
-    failstring = 'The current erlang cookie needs to change. In order to do this the RabbitMQ database needs to be wiped. Please set force => true to allow this tohappen automatically.'
-    fail(failstring) if (is != should && self[:force] != :true)
-  end
-
   newproperty(:content) do
     desc 'Content of cookie'
     newvalues(/^\S+$/)

manifests/config.pp

@@ -97,7 +97,6 @@
     require => File['/etc/rabbitmq'],
   }
 
-
   if $config_cluster {
 
     if $erlang_cookie == undef {

manifests/params.pp

@@ -59,7 +59,7 @@
   $delete_guest_user          = false
   $env_config                 = 'rabbitmq/rabbitmq-env.conf.erb'
   $env_config_path            = '/etc/rabbitmq/rabbitmq-env.conf'
-  $erlang_cookie              = 'EOKOWXQREETZSHFNTPEY'
+  $erlang_cookie              = undef
   $node_ip_address            = 'UNSET'
   $plugin_dir                 = "/usr/lib/rabbitmq/lib/rabbitmq_server-${version}/plugins"
   $port                       = '5672'