removing required_defaults_RedHat.yml;
efi_distro seems to only get used for grub_config_path, and 'rhel'
is not the correct path on my UEFI rhel8 system. It's 'redhat', and
according to the only documentation [1] I found on a quick search,
it's probably been this since EL6. Which means we can use
'redhat' all over the board.
The unique values in efi_distro, grub_efi_binary and shim_efi_binary
correspond to ansible_facts['distribution'], which holds true for
centos and fedora aswell, so we can put all these in RedHat_family
removing required_defaults_CentOS.yml;
The common values from required_defaults_RedHat_family.yml should
suffice.
removing required_defaults_Fedora.yml;
Support for fedora has been deprecated [2], but since it's in the
os_family of redhat, we're only missing 'qemu-kvm' and
'policycoreutils-python-utils' from 'required_packages', so
deployment will probably still work.
[1] https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/installation_guide/s2-grub-whatis-booting-uefi
[2] https://review.opendev.org/c/openstack/bifrost/+/818780
Change-Id: Ieb35391fae5bd24ab420dc4239117e045f8b35ed
3ed6ba0264