This change adds support for removing container IP information from
inventory. This might be useful in situations where an environment is
deployed, but network information has changed, or there was a mistake in
subnetting (such as an expanded used_ips range).
Updating configs, such as LXC interface files and HAProxy or other load
balancers is not handled via this command.
Change-Id: Ibad9d587e14c41ecd486ed8668f9f815e348a94a