Add utils locally in snmp edge router mixin (#1124)

* Add utils locally in snmp edge router mixin

* Fix fmt

Author: Muhammad Shahzeb

ubnt-edgerouter-mixin/dashboards/overview.jsonnet

@@ -5,7 +5,7 @@ local prometheus = grafana.prometheus;
 
 local gBuilder = import 'grafana-builder/grafana.libsonnet';
 
-local utils = import 'snmp-mixin/lib/utils.libsonnet';
+local utils = import '../lib/utils.libsonnet';
 
 local sharedMatcher = 'job=~"$job", instance=~"$instance", snmp_target=~"$snmp_target"';
 

ubnt-edgerouter-mixin/jsonnetfile.json

@@ -18,15 +18,6 @@
         }
       },
       "version": "master"
-    },
-    {
-      "source": {
-        "git": {
-          "remote": "https://github.com/grafana/jsonnet-libs.git",
-          "subdir": "snmp-mixin"
-        }
-      },
-      "version": "master"
     }
   ],
   "legacyImports": true

ubnt-edgerouter-mixin/lib/utils.libsonnet

@@ -0,0 +1,21 @@
+{
+  timeSeriesOverride(
+    unit='none',
+    fillOpacity=0,
+    lineInterpolation='linear',
+    showPoints='auto',
+  ):: {
+    type: 'timeseries',
+
+    fieldConfig: {
+      defaults: {
+        unit: unit,
+        custom: {
+          fillOpacity: fillOpacity,
+          lineInterpolation: lineInterpolation,
+          showPoints: showPoints,
+        },
+      },
+    },
+  },
+}