Squashed 'chef-repo/cookbooks/yum-centos/' content from commit 137896c

git-subtree-dir: chef-repo/cookbooks/yum-centos
git-subtree-split: 137896ce42259e12c898ec239ba20c21bb93ba08
Merge commit '36d46105ca6b36d6c931e26d6795b4cf3b09f29e' as 'chef-repo/cookbooks/yum-centos'