Use the right echo command.
Get rid of non-English locale files by moving the en files out of the way, deleting the contents of /usr/share/locale, then moving the en files back into place. This is less fragile than trying to use shell globbing.
Use the same method of getting rid of non-English locale files in the CentOS cleanup scripts.
Merge branch 'fix/GH1/cleanup_script_fixes'

This was resolved in: https://github.com/nickchappell/packer-templates/issues/1