fix bug in openstack-network-compute.pp

Limitation 'Nova_config<| |> -> Service['nova-network']' has a sense
only when multi_host == true. Moved this to corresponding branch of
the if $multi_host conditional.

Change-Id: Ie293b06c92e97bd101c616827fee25ff2e795791
Closes-bug: 1444122

deployment/puppet/osnailyfacter/modular/openstack-network/openstack-network-compute.pp

@@ -72,6 +72,8 @@ if $network_provider == 'nova' {
   if $multi_host {
     include keystone::python
 
+    Nova_config<| |> -> Service['nova-network']
+
     case $::osfamily {
       'RedHat': {
         $pymemcache_package_name      = 'python-memcached'
@@ -170,7 +172,7 @@ if $network_provider == 'nova' {
     ensure => 'installed',
   }
 
-  Nova_config<| |> -> Service['nova-network']
+
 
 } else {
   # Neutron