Ensure SSL certificate and key directories and symlinks are present
Ensure SSL certificate and key directories and symlinks are present

These tasks have been factored out of the horizon and keystone roles
so that they are only defined in a single place.

Change-Id: I074c005074e4e4071e4a57b3ddf7f4d508a56749

openstack/openstack-ansible-openstack_hosts,openstack/openstack-ansible-openstack_hosts