Fix typo with vncserver_listen and internal_address

If vncserver_listen is not set, it should properly fall back to
internal_address_real.

This fixes an issue with libvirt trying to resolve 'False' as a
hostname:

   getaddrinfo(False,5900): Name or service not known

Change-Id: I072aceb4e61c8714b3b0d272c19d10e295fc2eae
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>

manifests/all.pp

@@ -248,7 +248,7 @@ class openstack::all (
   if $vncserver_listen {
     $vncserver_listen_real = $vncserver_listen
   } else {
-    $vncserver_listen_real = $internal_address
+    $vncserver_listen_real = $internal_address_real
   }
   if $glance_api_servers {
     $glance_api_servers_real = $glance_api_servers

spec/classes/openstack_all_spec.rb

@@ -343,7 +343,7 @@ describe 'openstack::all' do
     it 'should have nova::compute::libvirt configured' do
       should contain_class('nova::compute::libvirt').with(
         :libvirt_type          => 'kvm',
-        :vncserver_listen      => false,
+        :vncserver_listen      => '10.0.0.1',
         :migration_support     => false
       )
     end