tls-everywhere-* validations fail for undercloud node if TLS everywhere is not configured

Issue

tls-everywhere-pre-deployment and tls-everywhere-post-deployment fail for undercloud node if TLS everywhere is not used:

{
    "task": {
        "hosts": {
            "undercloud": {
                "_ansible_no_log": false,
                "action": "command",
                "changed": false,
                "cmd": [
                    "ping",
                    "-c",
                    "3",
                    "ipa-ca"
                ],
                "delta": "0:00:00.008469",
                "end": "2020-10-07 09:05:09.867576",
                "failed": true,
                "invocation": {
                    "module_args": {
                        "_raw_params": "ping -c 3 ipa-ca",
                        "_uses_shell": false,
                        "argv": null,
                        "chdir": null,
                        "creates": null,
                        "executable": null,
                        "removes": null,
                        "stdin": null,
                        "stdin_add_newline": true,
                        "strip_empty_ends": true,
                        "warn": true
                    }
                },
                "msg": "non-zero return code",
                "rc": 2,
                "start": "2020-10-07 09:05:09.859107",
                "stderr": "ping: ipa-ca: Name or service not known",
                "stderr_lines": [
                    "ping: ipa-ca: Name or service not known"
                ],
                "stdout": "",
                "stdout_lines": []
            }
        },
        "name": "Try to ping ipa-ca",
        "status": "FAILED"
    }
}
{
    "task": {
        "hosts": {
            "undercloud": {
                "_ansible_no_log": false,
                "action": "reportentry",
                "changed": false,
                "failed": true,
                "invocation": {
                    "module_args": {
                        "report_reason": "DNS is NOT configured correctly",
                        "report_recommendations": [
                            "Check that the DNS server for this node points to IdM/FreeIPA",
                            "For the undercloud, you need to set the 'undercloud_nameservers' configuration parameter",
                            "For the overcloud, you need to set the 'DnsServers' parameter",
                            "Make sure that the relevant 'search' entry is in /etc/resolv.conf"
                        ],
                        "report_status": "ERROR"
                    }
                },
                "msg": "[ERROR] 'DNS is NOT configured correctly'\n - RECOMMENDATION: Check that the DNS server for this node points to IdM/FreeIPA\n - RECOMMENDATION: For the undercloud, you need to set the 'undercloud_nameservers' configuration parameter\n - RECOMMENDATION: For the overcloud, you need to set the 'DnsServers' parameter\n - RECOMMENDATION: Make sure that the relevant 'search' entry is in /etc/resolv.conf\n"
            }
        },
        "name": "DNS check",
        "status": "FAILED"
    }
}