Comment 3 for bug 1745375

Reviewed: https://review.openstack.org/540073
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ee2f65d91fb632f04be3572967029cd58be4c614
Submitter: Zuul
Branch: master

commit ee2f65d91fb632f04be3572967029cd58be4c614
Author: Surya Seetharaman <email address hidden>
Date: Thu Feb 1 18:56:10 2018 +0100

    Extending delete_cell --force to delete instance_mappings

    Currently the nova-manage delete_cell command with the --force option
    allows us to destroy hosts_mappings of the cell which does not have any
    instances or instance_mappings. This patch extends this command with the
    --force option for destroying instance_mappings in addition to the
    host_mappings of the cell which is to be deleted. Note that the instance
    mappings and host mappings are only removed if there are no living
    instances in the cell. So a --force delete here will not work if there
    are non-deleted instances.

    Change-Id: Ibefa0465224bec9a22431c7d3b5c8f5d91fc7732
    Closes-Bug: #1745375