Root partition always last

[Lucas Alvares Gomes]

When partitioning the disk without an ephemeral partition the partition layout order is: root, swap. If an ephemeral partition is present the layout then would be: ephemeral , swap and root. We need to make it more consistent by having the root partition to always be the last partition (or first if no ephemeral or swap is specified), that also would enable tools like cloud-init to use the growroot utility to expand the root partition until the end of the disk.

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/90675

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/90675
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=990d3173b3255e7457d7013402d7e864faed8974
Submitter: Jenkins
Branch: master

commit 990d3173b3255e7457d7013402d7e864faed8974
Author: Lucas Alvares Gomes <email address hidden>
Date: Mon Apr 28 10:58:29 2014 +0100

    Place root partition last so that it can always be expanded

    Make the partitioning layout consistent by having the root partition
    always be the last partition. This enables tools like cloud-init's
    growroot utility to expand the root partition until the end of the disk,
    regardless of the presence of a swap or ephemeral partition. In the
    case where there is neither a swap nor ephemeral partition, the root
    partition is the only partition created.

    Closes-Bug: #1313606
    Change-Id: I82492eb50530adc1f31e934f15f5c67462819a71