Grub2 package cannot be found on aarch64

[Harry Kominos]

When attempting to build aarch64 (not armv8 naming) Centos images with DIB, the grub2 packages cannot be found

I believe that the reason is

https://git.openstack.org/cgit/openstack/diskimage-builder/tree/diskimage_builder/elements/bootloader/finalise.d/50-bootloader#n68

which requests aarch64 but

https://git.openstack.org/cgit/openstack/diskimage-builder/tree/diskimage_builder/elements/bootloader/pkg-map does not specify anything for aarch64.

Adding:

"grub-efi-aarch64": "grub2-tools grub2-efi grub2-efi-modules"

Solves the issue for that architecture

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/598595

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/598595
Committed: https://git.openstack.org/cgit/openstack/diskimage-builder/commit/?id=c85141291ec33d0714b311f7c8b6b672fadfb6b2
Submitter: Zuul
Branch: master

commit c85141291ec33d0714b311f7c8b6b672fadfb6b2
Author: Charalampos Kominos <email address hidden>
Date: Fri Aug 31 12:49:36 2018 +0200

    Fix bootloader packages for aarch64

    Due to the arm naming convention, building centos images for arm64 and
    aarch64 does not yield the same result. In order to locate grub2 on
    aarch64 the correct mapping is added.

    Change-Id: I1bb227b2523e420e394fec8c52c6c79fcdd31c53
    Closes-Bug:#1789414
    Signed-off-by: Charalampos Kominos <email address hidden>