Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/yum/recipes/default.rb

@@ -0,0 +1,26 @@
+#
+# Author:: Sean OMeara (<someara@chef.io>)
+# Author:: Joshua Timberman (<joshua@chef.io>)
+# Recipe:: yum::default
+#
+# Copyright:: 2013-2017, Chef Software, Inc (<legal@chef.io>)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+yum_globalconfig '/etc/yum.conf' do
+  node['yum']['main'].each do |config, value|
+    send(config.to_sym, value) unless value.nil?
+  end
+
+  action :create
+end

cookbooks/yum/recipes/dnf_yum_compat.rb

@@ -0,0 +1,29 @@
+#
+# Author:: Tim Smith (<tsmith@chef.io>)
+# Recipe:: yum::fedora_yum_compat
+#
+# Copyright:: 2015-2017, Chef Software, Inc (<legal@chef.io>)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+execute 'make yum cache' do
+  command 'yum makecache'
+  action :nothing
+end
+
+execute 'install yum' do
+  command 'dnf install yum -y'
+  not_if { ::File.exist?('/var/lib/yum') }
+  action :nothing
+  notifies :run, 'execute[make yum cache]', :immediately
+end.run_action(:run)