adds debounce duration for alert dashboards in ha_test

devenv/docker/ha_test/docker-compose.yaml

@@ -9,7 +9,7 @@ services:
       - /var/run/docker.sock:/tmp/docker.sock:ro
 
   db:
-    image: mysql
+    image: mysql:5.6
     environment:
       MYSQL_ROOT_PASSWORD: rootpass
       MYSQL_DATABASE: grafana

devenv/docker/ha_test/grafana/provisioning/alerts.jsonnet

@@ -39,6 +39,7 @@ local alertDashboardTemplate = {
         "executionErrorState": "alerting",
         "frequency": "10s",
         "handler": 1,
+        "for": "1m",
         "name": "bulk alerting",
         "noDataState": "no_data",
         "notifications": [