fix(amazon-vpc-cni-k8s): fix node failures and pod creations errors d…

…ue to missing cni config

This fixes the node condition issue that can be seen by runnign `kubectl describe node NODE`:

```
  Ready            False   Sun, 30 Sep 2018 18:42:40 +0900   Sun, 30 Sep 2018 18:31:49 +0900   KubeletNotReady              runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized
```

core/controlplane/config/templates/cloud-config-controller

@@ -4970,7 +4970,9 @@ write_files:
                 path: /opt/cni/bin
             - name: cni-net-dir
               hostPath:
-                path: /etc/cni/net.d
+                # changed from /etc/cni/net.d to /etc/kubernetes/cni/net.d to accomodate kube-aws' setup
+                # original: https://github.com/aws/amazon-vpc-cni-k8s/blob/a91e807c8d752a13f8047f54fa78fcd3a37dfc20/config/v1.1/aws-k8s-cni.yaml#L92
+                path: /etc/kubernetes/cni/net.d
             - name: log-dir
               hostPath:
                 path: /var/log