Remove deprecated rabbit params

Remove the deprecated rabbit params which has been deprecated for
two years. The default_transport_url has been present for a while
now and should be used.

Change-Id: I6b239ffca2184f553311428b92cd7043b4289b63

spec/classes/neutron_agents_dhcp_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe 'neutron::agents::dhcp' do
 
   let :pre_condition do
-    "class { 'neutron': rabbit_password => 'passw0rd' }"
+    "class { 'neutron': }"
   end
 
   let :params do