Verified this bug with openshift-ansible-3.6.98-1.git.0.e651d65.el7.noarch, and PASS.
Change instance name, set openshift_hostname for each node, and make sure they have the same value, trigger installation, succeed.
# grep nodeName /etc/origin/node/node-config.yaml
nodeName: <hostname>
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2017:1716