Make ipa-client-automount backwards compatible
ipa-client-automount calls automountlocation-show command during the
process. Unfortunately, FreeIPA commands are forward compatible only
and thus fail the installer.
Similarly to ipa-client-install, call XML-RPC interface directly
with version fixed to 2.0 (command was already available at that
version) to fix the failure.
https://fedorahosted.org/freeipa/ticket/4290
Reviewed-By: Rob Crittenden <rcritten@redhat.com>