When bootstrapping a host for kolla-ansible the 'kolla-ansible
bootstrap-servers' command can fail if for any of the hosts the
'api_interface' is invalid. This happen if the host does not have a
network interface matching 'api_interface'. This is possible on
a host running bifrost, as bifrost does not require the api_interface
variable to be set.
This change avoids adding a hosts entry for hosts in the bifrost group
that do not have a valid api_interface. It also avoids modifying the
hosts file on hosts in the bifrost group that do not have a valid
api_interface.
Change-Id: Ie111ef54130adf2556ce83c402cdbb5058ace4f6
Closes-bug: #1665364
64b09d6eb0