Transform mongodb::server::bind_ip in an array
Transform mongodb::server::bind_ip in an array

Because puppet-mongodb requires it to be an array and not a string.
See https://github.com/voxpupuli/puppet-mongodb/commit/23068c10a41b5f696ed9d6077d6c633c71e519fc

Co-Authored-By: Juan Antonio Osorio Robles <d8dc07dad5d21128befc050da3d4f0626ea7fe63@redhat.com>
Change-Id: I3c1ea4f350ecaea2efcf53ebf8ac26e4936054f7
Closes-Bug: #1726217

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