Add a check before wiping Ceph disks in bootstrap

[OpenStack Infra]

https://review.openstack.org/337594
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/kolla" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit ec40ed3cbb4ab0bb2b1dd229b6de5d206bbca5b1
Author: Paul Bourke <email address hidden>
Date: Tue Jul 5 11:05:26 2016 +0100

    Add a check before wiping Ceph disks in bootstrap

    An unwitting user may apply the KOLLA_CEPH_OSD[_CACHE]_BOOTSTRAP label
    to a partition assuming it will only use that partition for Ceph, and
    end up wiping out their disk.

    This change adds a layer of checking to this scenario to try and help
    avoid a disaster scenario.

    Closes-Bug: 1599103
    DocImpact

    Change-Id: Ibb9fb42f87a76bc02165ec0b93b60234bad8747a

[Radosław Piliszek (yoctozepto)]

Deploying Ceph is deprecated and no longer supported.