[Perfectscale] add medadata.csv with metric description

perfectscale/manifest.json

@@ -49,6 +49,23 @@
   "assets": {
     "dashboards": {
       "PerfectScale": "assets/dashboards/perfectscale_alerts.json"
+    },
+    "integration": {
+      "auto_install": true,
+      "source_type_id": 22758120,
+      "source_type_name": "Perfectscale",
+      "configuration": {},
+      "events": {
+        "creates_events": false
+      },
+      "metrics": {
+        "prefix": "perfectscale.",
+        "check": "perfectscale.alert.metric",
+        "metadata_path": "metadata.csv"
+      },
+      "service_checks": {
+        "metadata_path": "assets/service_checks.json"
+      }
     }
   },
   "author": {

perfectscale/metadata.csv

@@ -0,0 +1,2 @@
+metric_name,metric_type,interval,unit_name,per_unit_name,description,orientation,integration,short_name,curated_metric
+perfectscale.alert.metric,count,,,,The number of alerts by cluster,0,perfectscale,alert.metric,