Fix dependency to purge default vhost config

It turned out defining dependency for openstacklib::wsgi::apache
doesn't properly enforce resource order and the default vhost file
is not purged properly.
This change adds the more explicit dependency to enforce the order
properly.

Change-Id: I8a15ccf292b5f7cd90bb45624780f0ef012abe38

manifests/wsgi/apache.pp

@@ -134,6 +134,8 @@ class ironic::wsgi::apache (
   include ironic::deps
   include ironic::params
 
+  Anchor['ironic::install::end'] -> Class['apache']
+
   ::openstacklib::wsgi::apache { 'ironic_wsgi':
     bind_host                   => $bind_host,
     bind_port                   => $port,
@@ -163,6 +165,5 @@ class ironic::wsgi::apache (
     access_log_format           => $access_log_format,
     error_log_file              => $error_log_file,
     custom_wsgi_process_options => $custom_wsgi_process_options,
-    require                     => Anchor['ironic::install::end'],
   }
 }