Fixed #196 - Exponential lag on auto-updating dashboards.

Disabled hosts and items cahching.

src/datasource-zabbix/queryProcessor.service.js

@@ -227,14 +227,13 @@ angular.module('grafana.services').factory('QueryProcessor', function($q) {
        *          }, ...
        *       ]
        */
-      var self = this;
 
       // Group history by itemid
       var grouped_history = _.groupBy(history, 'itemid');
       var hosts = _.indexBy(_.flatten(_.map(items, 'hosts')), 'hostid');
 
       return _.map(grouped_history, function(hist, itemid) {
-        var item = self.cache.getItem(itemid);
+        var item = _.find(items, {'itemid': itemid});
         var alias = item.name;
         if (_.keys(hosts).length > 1 || addHostName) {
           var host = hosts[item.hostid];