Fixed the Comparison to be Case insensitive for Network Type

Author: Dinesh Govindasamy

plugins/main/windows/l2bridge/l2bridge_windows.go

@@ -71,7 +71,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 		return fmt.Errorf("network %v not found", networkName)
 	}
 
-	if hnsNetwork.Type != "L2Bridge" {
+	if !strings.EqualFold(hnsNetwork.Type,"L2Bridge") {
 		return fmt.Errorf("network %v is of an unexpected type: %v", networkName, hnsNetwork.Type)
 	}
 

plugins/main/windows/overlay/overlay_windows.go

@@ -78,7 +78,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 		return fmt.Errorf("network %v not found", networkName)
 	}
 
-	if hnsNetwork.Type != "Overlay" {
+	if !string.EqualFold(hnsNetwork.Type,"Overlay") {
 		return fmt.Errorf("network %v is of an unexpected type: %v", networkName, hnsNetwork.Type)
 	}