fix integration name in metadata.csv for vns3
metric_name,metric_type,interval,unit_name,per_unit_name,description,orientation,integration,short_name
-vns3.ipsec,gauge,,,,IPSec tunnel connection state,0,python,vns3 ipsec
-vns3.overlay.clients,gauge,,,,Overlay client connection state,0,python,vns3 clients
-vns3.peering,gauge,,,,VNS3 peer link state,0,python,vns3 peers
\ No newline at end of file
+vns3.ipsec,gauge,,,,IPSec tunnel connection state,0,vns3,vns3 ipsec
+vns3.overlay.clients,gauge,,,,Overlay client connection state,0,vns3,vns3 clients
+vns3.peering,gauge,,,,VNS3 peer link state,0,vns3,vns3 peers
