Remove all usages of shade in favor of openstacksdk

[sbesson]

From https://docs.openstack.org/shade/latest/, shade has been superceded by openstacksdk and no longer takes new features. The existing code will continue to be maintained indefinitely for bugfixes as necessary, but improvements will be deferred to openstacksdk. Please update your applications to use openstacksdk directly.

#319 updates the resource deletion and IP swapping scripts to use openstacksdk directly. openstack-idr.py is the last location using shade which will need updating. At a quick glance, it might be worth checking whether the dynamic inventory from https://docs.openstack.org/openstack-ansible could be used directly