Clear alarm metadata type (#1425)

* Fix NPE in netty-mqtt client on puback

* Fix gateway mqtt extension configuration - filter is not required

* device type expression in mqtt extension config is not required

* Metadata parameter usage added to Clear Alarm Node

* rulenode-core-config.js updated

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbClearAlarmNode.java

@@ -54,7 +54,8 @@ public class TbClearAlarmNode extends TbAbstractAlarmNode<TbClearAlarmNodeConfig
 
     @Override
     protected ListenableFuture<AlarmResult> processAlarm(TbContext ctx, TbMsg msg) {
-        ListenableFuture<Alarm> latest = ctx.getAlarmService().findLatestByOriginatorAndType(ctx.getTenantId(), msg.getOriginator(), config.getAlarmType());
+        String alarmType = TbNodeUtils.processPattern(this.config.getAlarmType(), msg.getMetaData());
+        ListenableFuture<Alarm> latest = ctx.getAlarmService().findLatestByOriginatorAndType(ctx.getTenantId(), msg.getOriginator(), alarmType);
         return Futures.transformAsync(latest, a -> {
             if (a != null && !a.getStatus().isCleared()) {
                 return clearAlarm(ctx, msg, a);