Fix elasticsearch connectivity on logstash.o.o.

The new elasticsearch server needs to be able to connect back to
logstash over the elasticsearch ports. Also make kibana talk to the new
elasticsearch server.

Change-Id: I88af40c7885b263fcef5ff16210f073cd0a696a5
Reviewed-on: https://review.openstack.org/30354
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins

manifests/web.pp

@@ -17,7 +17,8 @@
 class logstash::web (
   $vhost_name = $::fqdn,
   $serveradmin = "webmaster@${::fqdn}",
-  $frontend = 'internal'
+  $frontend = 'internal',
+  $elasticsearch_host = 'localhost',
 ) {
   include apache
   a2mod { 'rewrite':
@@ -54,7 +55,9 @@ class logstash::web (
     }
 
     'kibana': {
-      include kibana
+      class { 'kibana':
+        elasticsearch_host => $elasticsearch_host,
+      }
       $vhost = 'logstash/kibana.vhost.erb'
     }