add pricing_schema.csv

configs/pricing_schema.csv

@@ -0,0 +1,2 @@
+EndTimestamp,InstanceID,AssetClass,InstanceIDField,InstanceType,MarketPriceHourly,Version
+2019-04-17 23:34:22 UTC,gke-standard-cluster-1-pool-1-91dc432d-cg69,node,metadata.name,,0.1337,