[release-4.3] Wait before applying etcd cluster

[openshift-cherrypick-robot]

This is an automated cherry-pick of #120

/assign csrwng

[openshift-ci-robot]

@openshift-cherrypick-robot: No Bugzilla bug is referenced in the title of this pull request.
To reference a bug, add 'Bug XXX:' to the title of this pull request and request another bug refresh with /bugzilla refresh.

In response to this:

[release-4.3] Wait before applying etcd cluster

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[csrwng]

/approve
/lgtm

[openshift-ci-robot]

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