Run the SSL verification at step2
Run the SSL verification at step2

Run the SSL verification at step2 instead of host_prep as we need
to have CACerts injected before being able to validate the SSL
certificates.  It looks like NodeTLSCerts is getting deprecated
and CI has already moved away from taht method .

Change-Id: I5e3491efd12ad2445a3d77f0907fbb766fe54466
Closes-bug: #1961056

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates