Replace omnibus_updater with chef_client_updater

omnibus_updater is deprecated

cookbooks/chef_client_updater/attributes/default.rb

@@ -0,0 +1,29 @@
+#
+# Cookbook::  chef_client_updater
+# Attributes:: default
+#
+# Copyright:: 2016-2017, Chef Software, Inc.
+#
+# 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.
+
+# stable or current channel
+default['chef_client_updater']['channel'] = 'stable'
+
+# prevent a newer client "updating" to an older client
+default['chef_client_updater']['prevent_downgrade'] = true
+
+# the version to install (ex: '12.12.13') or 'latest'
+default['chef_client_updater']['version'] = 'latest'
+
+# kill the client post install or exec the client post install for non-service based installs
+default['chef_client_updater']['post_install_action'] = 'kill'