Fix overlays not being updated for gcr migration

[wongma7]

Is this a bug fix or adding new feature?
/bug

What is this PR about? / Why do we need it?
Fixing some oversights/neglect/mistakes from gcr migration. See: #646

What testing is done?

kubectl apply -k ./deploy/kubernetes/overlays/stable
k get deployment -n kube-system ebs-csi-controller
NAME                 READY   UP-TO-DATE   AVAILABLE   AGE
ebs-csi-controller   2/2     2            2           19d
k get deployment -n kube-system ebs-csi-controller -o jsonpath="{.spec.template.spec.containers[0].image}"
k8s.gcr.io/provider-aws/aws-ebs-csi-driver:v0.8.0^J  
kubectl apply -k ./deploy/kubernetes/overlays/dev
k get deployment -n kube-system ebs-csi-controller -o jsonpath="{.spec.template.spec.containers[0].image}"
k8s.gcr.io/provider-aws/aws-ebs-csi-driver:latest

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This pull-request has been approved by: wongma7

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[wongma7]

I will get this into release-0.8 brancsh also after #650 merges

[nckturner]

/lgtm

[wongma7]

manual merge, this is not a code change!!!!

[ayberk]

LGTM

[wongma7]

nvm I can't manual merge.

[wongma7]

merging, travis is stuck again.

considering moving all travis stuff to a prow job