improved class ordering

- moved host_config to front
- moved omnibus_config in front of install
 - closes voxpupuli#240
- made service a non-subscribe in init.pp ordering
 - required for voxpupuli#239

 closes voxpupuli#237

manifests/host_config.pp

@@ -36,4 +36,6 @@
     group  => 'root',
     mode   => '0644',
   }
+
+  include gitlab::backup
 }

manifests/init.pp

@@ -443,13 +443,12 @@
   Hash                           $global_hooks                  = {},
 ) inherits gitlab::params {
 
-  contain gitlab::preinstall
+  contain gitlab::host_config
+  contain gitlab::omnibus_config
   contain gitlab::install
-  contain gitlab::config
   contain gitlab::service
-  contain gitlab::backup
 
-  Class['gitlab::preinstall'] -> Class['gitlab::install'] -> Class['gitlab::config'] ~> Class['gitlab::service'] -> Class['gitlab::backup']
+  Class['gitlab::host_config'] -> Class['gitlab::omnibus_config'] -> Class['gitlab::install'] -> Class['gitlab::service']
 
   $custom_hooks.each |$name, $options| {
     gitlab::custom_hook { $name: