update cni image to test help test ec2 describenetworkinterface (awslabs#464)

Author: hakuna-matatah

tests/tasks/setup/eks/awscli-cp-with-vpc.yaml

@@ -74,6 +74,8 @@ spec:
       kubectl api-resources
       # Apiserver is not recongnizing deamonset for sometime inconsistently, need to see if livez/readyz are healthy
       while true; do date && kubectl get --raw "/readyz" --v=10 && break ; sleep 5; done
+      #ToDo remove this, adding to help eks networking evaluate ec2 DescribeNetworkInterface feature performance
+      kubectl set image daemonset/aws-node -n kube-system aws-node=public.ecr.aws/e4l5e7p8/amazon/amazon-k8s-cni:v1.18.3-scalability-rc1
       kubectl set env daemonset/aws-node -n kube-system ENABLE_PREFIX_DELEGATION=true
       # install csi drivers.
       kubectl apply -k "github.com/kubernetes-sigs/aws-ebs-csi-driver/deploy/kubernetes/overlays/stable/?ref=$(params.aws-ebs-csi-driver-version)"