Updated openstack/openstack
Project: openstack-dev/devstack  c9ccaaa9561699a17537aa57538dc99203ac8bbc

Do not regenerate ironic ssh key if one exists

Gets rid of redundant globals and avoids regenerating an ssh key
for ironic if one exists.  Also allows key file to be user-specified,
letting ironic use pregenerated keys.

Change-Id: Iaa6f8918bf14dae2116269a0be5039fc5afaecfa