add null for max graph value https://github.com/Security-Onion-Solutions/securityonion/issues/1175

salt/grafana/dashboards/eval/eval.json

@@ -3048,7 +3048,7 @@
           "custom": {},
           "unit": "s",
           "min": 0,
-          "max": ,
+          "max": null,
           "decimals": 2,
           "thresholds": {
             "mode": "absolute",

salt/grafana/dashboards/sensor_nodes/sensor.json

@@ -1118,7 +1118,7 @@
           "custom": {},
           "unit": "s",
           "min": 0,
-          "max": ,
+          "max": null,
           "decimals": 2,
           "thresholds": {
             "mode": "absolute",

salt/grafana/dashboards/standalone/standalone.json

@@ -199,6 +199,9 @@
       "thresholds": [],
       "timeRegions": []
     },
+
+
+    
     {
       "datasource": "InfluxDB",
       "fieldConfig": {