Fixed issue with rabbit_hosts parameter

We should initialize rabbit_hosts parameter with array,
not with string or boolen value.

Change-Id: Iab51d77c35fb78f70060115e0ca48238f6f9de50
Closes-Bug: #1470054

manifests/init.pp

@@ -46,7 +46,7 @@
 #
 # [*rabbit_hosts*]
 #   (optional) List of clustered rabbit servers.
-#   Defaults to false
+#   Defaults to undef
 #
 # [*rabbit_port*]
 #   (optional) Port for rabbitmq instance.
@@ -276,7 +276,7 @@ class nova(
   $glance_api_servers                 = 'localhost:9292',
   $memcached_servers                  = false,
   $rabbit_host                        = 'localhost',
-  $rabbit_hosts                       = false,
+  $rabbit_hosts                       = undef,
   $rabbit_password                    = 'guest',
   $rabbit_port                        = '5672',
   $rabbit_userid                      = 'guest',
@@ -526,6 +526,7 @@ class nova(
       nova_config { 'oslo_messaging_rabbit/rabbit_port':      value => $rabbit_port }
       nova_config { 'oslo_messaging_rabbit/rabbit_hosts':     value => "${rabbit_host}:${rabbit_port}" }
     }
+
     if $rabbit_ha_queues == undef {
       if $rabbit_hosts {
         nova_config { 'oslo_messaging_rabbit/rabbit_ha_queues': value => true }

manifests/manage/cells.pp

@@ -41,7 +41,7 @@
 #
 #  [*rabbit_hosts*]
 #    (optional) Address of the message broker in this cell
-#    Defaults to 'localhost'
+#    Defaults to ['localhost']
 #
 #  [*rabbit_port*]
 #    (optional) Port number of the message broker in this cell
@@ -64,7 +64,7 @@ define nova::manage::cells (
   $cell_parent_name    = undef,
   $rabbit_username     = 'guest',
   $rabbit_password     = 'guest',
-  $rabbit_hosts        = 'localhost',
+  $rabbit_hosts        = ['localhost'],
   $rabbit_port         = '5672',
   $rabbit_virtual_host = '/',
   $weight_offset       = '1.0',

spec/classes/nova_init_spec.rb

@@ -269,6 +269,17 @@ describe 'nova' do
       end
     end
 
+    context 'with rabbit_ha_queues set to false and with rabbit_hosts' do
+      let :params do
+        { :rabbit_ha_queues => 'false',
+          :rabbit_hosts => ['rabbit:5673'] }
+      end
+
+      it 'configures rabbit' do
+        is_expected.to contain_nova_config('oslo_messaging_rabbit/rabbit_ha_queues').with_value(false)
+      end
+    end
+
     context 'with amqp_durable_queues parameter' do
       let :params do
         { :rabbit_hosts => ['rabbit:5673'],