acceptance: install RabbitMQ from stable RDO repo

Replace testing repo by the stable one which is the way to go now for
running RDO packaging.

Change-Id: Ib53a127e15a8c1353bfb0f118a36079a2dd1f4f1

spec/acceptance/rabbitmq_spec.rb

@@ -9,18 +9,8 @@ describe 'openstacklib class' do
       Exec { logoutput => 'on_failure' }
 
       if $::osfamily == 'RedHat' {
-        # RabbitMQ is not available in default repo
         class { '::openstack_extras::repo::redhat::redhat':
-          # Kilo is not GA yet, so let's use the testing repo
-          manage_rdo => false,
-          repo_hash  => {
-            'rdo-kilo-testing' => {
-              'baseurl'  => 'https://repos.fedorapeople.org/repos/openstack/openstack-kilo/testing/el7/',
-              # packages are not GA so not signed
-              'gpgcheck' => '0',
-              'priority' => 97,
-            },
-          },
+          release => 'kilo',
         }
         $package_provider = 'yum'
       } else {