Fill DNS name for haproxy certificates
Fill DNS name for haproxy certificates

This sets the subject alt name field for the certificates we
auto-generate, which will remove the security warnings we constantly
see in the undercloud. This is the proper way to set certificates,
since the usage of the CN as a replacement for the subjectAltName is
being deprecated (very slowly).

Change-Id: I475cbffd47425e850902838eec06bf461df2acd0
Closes-Bug: #1622446

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo