leap_cli: detect fact changes, bomb out and force leap facts update
Because of a change in openstack, the ec2 facts are not detected on newer openstack. To solve this we install a newer facter in setup.pp, but it seems like leap facts update needs to be run and a re-deploy happens. We need to get leap cli to do something about this.
(from redmine: created on 2013-06-27, relates #2014 (closed), relates #3021 (closed))