Backport note:
This backport includes 5f84cf371b19c6aeffd423aa2001be7acd5c9c96 which
fixed the parameter description order.
Conflicts:
manifests/init.pp
manifests/magnum.pp
spec/classes/tempest_magnum_spec.rb
Change-Id: If1fddd56828c93c19499ac8dadb2337b3f2afc46
(cherry picked from commit cd44577546e66ce4c1806e2e8e31e21e5a818904)
(cherry picked from commit d6fa19fa2d6978d0f7ec6b22790c532fac2cabad)