CCE 26995-1 grub file perms

Not sure that we should add the grub.conf remediation scripts to the `shared` bash fixes folder as the grub.conf remediation would only apply to RHEL6. The remediation script would probably need to be named `file_permissions_grub2_cfg.sh` for RHEL/7 and Fedora which should go into the `shared` folder.

My personal preference would be to have the grub.conf scripts stay in ` RHEL/6/input/fixes/bash` for RHEL6 and have the grub2.cfg scripts in `shared/fixes/bash/` for Fedora and RHEL7. Or, have a script that can handle both grub and grub2 settings.