Update ES to 1.7.3

The actual upgrade is handled by ansible but this will enforce the
correct version for any new host builds. This should be merged after the
ansible managed upgrade is complete.

Change-Id: Ieda9cdffe7486d24f17012de5fc094d18a45ec78

modules/openstack_project/manifests/elasticsearch_node.pp

@@ -34,7 +34,7 @@ class openstack_project::elasticsearch_node (
       'discovery.zen.ping.unicast.hosts'     => $discover_nodes,
     },
     heap_size          => $heap_size,
-    version            => '0.90.9',
+    version            => '1.7.3',
   }
 
   cron { 'delete_old_es_indices':

modules/openstack_project/manifests/logstash_worker.pp

@@ -55,6 +55,6 @@ class openstack_project::logstash_worker (
       'node.data'                            => false,
     },
     heap_size          => '1g',
-    version            => '0.90.9',
+    version            => '1.7.3',
   }
 }