Failed to install RHMAP 4.5 to OCP that has multiple nodes

Issue

• Failed to install RHMAP.

# cd /opt/rhmap/4.5/rhmap-installer
# ansible-playbook -i /root/multi-node-example playbooks/core.yml -vv

TASK [login : Login as user using the OpenShift command line tool] ********************************************************************
task path: /opt/rhmap/4.5/rhmap-installer/roles/login/tasks/main.yml:14
fatal: [rhmap-core2.example.com]: FAILED! => {
    "changed": true,
    "cmd": [
        "oc",
        "login",
        "--username=admin",
        "--password=password"
    ],
    "delta": "0:00:00.279003",
    "end": "2017-10-19 18:58:15.970796",
    "failed": true,
    "rc": 1,
    "start": "2017-10-19 18:58:15.691793"
}

STDERR:

error: A server URL must be specified

fatal: [rhmap-core3.example.com]: FAILED! => {
    "changed": true,
    "cmd": [
        "oc",
        "login",
        "--username=admin",
        "--password=password"
    ],
    "delta": "0:00:00.318279",
    "end": "2017-10-19 18:58:15.994869",
    "failed": true,
    "rc": 1,
    "start": "2017-10-19 18:58:15.676590"
}

STDERR:

error: A server URL must be specified

fatal: [rhmap-core1.example.com]: FAILED! => {
    "changed": true,
    "cmd": [
        "oc",
        "login",
        "--username=admin",
        "--password=password"
    ],
    "delta": "0:00:00.328427",
    "end": "2017-10-19 18:58:15.995915",
    "failed": true,
    "rc": 1,
    "start": "2017-10-19 18:58:15.667488"
}

STDERR:

error: A server URL must be specified


PLAY RECAP ****************************************************************************************************************************
rhmap-core1.example.com       : ok=2    changed=0    unreachable=0    failed=1
rhmap-core2.example.com       : ok=2    changed=0    unreachable=0    failed=1
rhmap-core3.example.com       : ok=2    changed=0    unreachable=0    failed=1