Puppetfile: add puppetlabs-firewall to modules
Puppetfile: add puppetlabs-firewall to modules

This module is needed for puppet-pacemaker and also will be used later
to introduce network security.

gwdg/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud,goneri/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud,goneri/puppet-openstack-cloud