OpenShift 3.11 installation on OpenStack fails during TASK "Approve node certificates when bootstrapping"

Issue

Installation fails in task "Approve node certificates when bootstrapping":

...
    "raw_failures": [
        [
            "infra-node-0.openshift.example.com", 
            1, 
            "", 
            "Error from server (ServiceUnavailable): the server is currently unable to handle the request\n"
        ]
...

Error above occurs due to failing calls from Master -> Node over port 10250. The Master -> Node communication over port 10250 [1] fails with this message:

  dial tcp 10.125.66.66:10250: i/o timeout'\nTrying to reach: 'https://infra-node-0.openshift.example.com:10250/healthz