Similar to I84acaa917187db092a302519c14bc94a6a87c2c0, this is a
follow-on to I286796ebd71173019a627f8fe8d9a25d0bfc575a.
At this point, there is no "bastion" group for the executor Ansible to
use.
The idea here is to reduce the number of places we're directly
referencing bridge.openstack.org. We could move this into a job
variable, but that's the same as defining it here. KISS and reference
it directly here (since it's in a role and used multiple times, it's
still better than hardcoding in multiple places).
Change-Id: If6dbcb34e25e3eb721cd2892b8adb84344289882
2f213de5a6