Fix scoping issue for elasticsearch

openstack_project::elasticsearch exists, so the scoping for this
is incorrect. We want to find the module instead.

Change-Id: I29b28af957f6aadc779c61fb0360bce98e64cb9b

modules/openstack_project/manifests/wiki.pp

@@ -57,7 +57,7 @@ class openstack_project::wiki (
     backup_server => 'ci-backup-rs-ord.openstack.org',
   }
 
-  class { 'elasticsearch':
+  class { '::elasticsearch':
     discover_nodes => ['localhost'],
     version        => '0.90.5',
   }