Deprecate bifrost support

My downstream team does not maintain this and the settings
which are embedded and encoded in puppet-ironic are incorrect
and no longer match the current state of Bifrost as an independent
sub-project of ironic.

Given this state, and the fact it is largely independent tooling
which duplicates much of puppet-ironic, it does not make sense to
maintain, and is thus deprecated.

Change-Id: Ia456fcea46c44c23d8c99fbf3bb59b63180a28f2

manifests/bifrost.pp

@@ -14,7 +14,7 @@
 
 # == Class: ironic::bifrost
 #
-# Installs and configures Bifrost
+# DEPRECATED - Installs and configures Bifrost
 # Bifrost is a set of Ansible playbooks that automates the task of deploying a
 # base image onto a set of known hardware using Ironic. It provides modular
 # utility for one-off operating system deployment with as few operational requirements
@@ -22,6 +22,8 @@
 # Bifrost also allows to install Ironic in a stand-alone fashion. In this kind of setup,
 # neither Keystone nor Neutron is installed, and dnsmasq is used to provide PXE booting.
 #
+# DEPRECATED PARAMETERS
+#
 # [*ironic_db_password*]
 #   (required) The Ironic DB password
 #
@@ -188,6 +190,8 @@ class ironic::bifrost (
 
   include ironic::deps
 
+  warning('ironic::bifrost is deprecated and will be removed during the OpenStack Yoga development cycle.')
+
   git { $git_dest_repo_folder:
     ensure => $ensure,
     branch => $revision,

releasenotes/notes/deprecates-bifrost-support-816bc270574ac32d.yaml

@@ -0,0 +1,10 @@
+---
+deprecations:
+  - |
+    Deprecates integration for Ironic's Bifrost sub-project.
+    
+    Bifrost serves a similar purpose as puppet-ironic, in so much as the
+    embedded configuration lags behind and ultimately is no longer appropriate
+    for a bifrost deployment. If you wish to deploy bifrost, please make use of
+    the bifrost-cli tool or Ansible playbooks noted in
+    `Bifrost's documentation <https://docs.openstack.org/bifrost/latest/>`_.