Verified vncserver_listen is no longer configured to 0.0.0.0
[root@compute-1 ~]# grep vncserver_listen /etc/nova/nova.conf
vncserver_listen=172.17.1.21
Verified on openstack-tripleo-heat-templates-5.2.0-18.el7ost.noarch
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/RHBA-2017:1585