Ironic have changed an API response without a microversion :(

We must also bump the lower-constraint of os-service-types, since we
have a test that verifies that we are using the latest and greatest
version.

Change-Id: I1e7ac6fbf70519190f1e51c0d8651cc5f4a776fc
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>