this change forces ironic to interact with the OpenStack InternalURL
instead of trying to use the public one. This is needed to ensure Ironic
isn't instructing it's nodes to retrieve user images from a public address
that they may not have access to.
Change-Id: Ibfeba53c2be802c51a3edc386e50fcbab8d0b01b
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>