Could you please file an issue report about these packages at bugs.centos.org/ and mark it against 6.1 QA
The question will be what URL to put in place for the satellite server.
A place holder of HTTP://your.satellite.server.here would probably be sensible.
I still do question the point of this given that in kickstart you would still have to replace this and import the spacewalk certificate. If doing that much it is trivial to have a --repo line and a local copy of the 22 packages that make up the spacewalk client report either as a channel or a proper yum repo.