Update gk-deploy

[eliezerchavez]

kubectl -n storage get pod --no-headers --show-all --selector="heketi" | awk '{print $1}'
Error: unknown flag: --show-all

This issue doesn't allow the setup completes successfully.

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This change is 

[centos-ci]

Can one of the admins verify this patch?

[oruchreis]

I created pods in a custom namespace other than default. So I've changed the line with "--all-namespaces". And I'm getting ip:port from endpoints because show-all is not supported anymore:

kubectl get endpoints --no-headers -o wide --all-namespaces | grep 'heketi ' | awk '{print $2}'