MON-386 move ingress to specific vts sub directory

caas/kubernetes/ingress/vts/README.md

@@ -63,7 +63,9 @@ https://github.com/kubernetes/ingress-nginx/pull/423/commits/1d38e3a38425f08de2f
 
 Nginx Ingress Controller setup
 ------------------------------
-This configuration and monitors only works for ingress controller >= 0.10 and <= 0.15.
+This configuration and monitors only work for ingress controller version :
+- >= 0.10 because ingress is beta before that and metrics naming convention not stable
+- <= 0.15 because ingress does not use VTS metrics since 0.16
 Enable the following flags in the Nginx Ingress Controller chart
 controller.stats.enabled=true,controller.metrics.enabled=true
 and the following Datadog agent configuration for each ingress controller: