refactor: move history calls to zabbix module

src/datasource-zabbix/zabbix/connectors/sql/zabbixDBConnector.js

@@ -95,7 +95,7 @@ export class ZabbixDBConnector {
   }
 
   getTrends(items, timeFrom, timeTill, options) {
-    let {intervalMs, consolidateBy} = options;
+    let { intervalMs, consolidateBy } = options;
     let intervalSec = Math.ceil(intervalMs / 1000);
 
     consolidateBy = consolidateBy || 'avg';

src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.js

@@ -8,8 +8,6 @@ import { ZabbixAPICore } from './zabbixAPICore';
  * Wraps API calls and provides high-level methods.
  */
 export class ZabbixAPIConnector {
-
-  /** @ngInject */
   constructor(api_url, username, password, basicAuth, withCredentials, backendSrv) {
     this.url              = api_url;
     this.username         = username;