Fix Centos Initramfs Grow Root setup
Created by: stumped2
Currently the centos packer script downloads a git repo in order to manage initramfs and cloud-init-growroot.
There is a dracut module that handles this without having to install git, clone a repo, and create a seperate initramfs.
It just installs dracut-modules-growroot
and then tels dracut to recreate the initramfs.
Ihave tested this packer script and it grows the root partition without any issues.