cts: Make it run with pacemaker-1.13+

There are changes in pacemaker-cts which corosync-testagents denpends
on. With these changes, corosync-testagents can not run. This patch
fixes the issues, and makes corosync-testagents run.

Signed-off-by: Bin Liu <bliu@suse.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>