https://issues.redhat.com//browse/OCPBUGS-10342 tracked the issue when the number of replicas exceeded the number of hosts. However, it does not detect the case when the number of hosts exceeds the number of replicas as it was not counting the hosts correctly. Fix to detect this case correctly.

1. Set compute replicas in install-config.yaml
2. Add hosts in agent-config.yaml - 3 with role of master and more than 2 with role of worker.
3. The installation will fail and following error could be seen in the journal 
Jun 12 01:10:57 master-0 start-cluster-installation.sh[3879]: Hosts known and ready for cluster installation (5/3) 

No warning regarding the number of configured hosts

A warning about the number of configured hosts not matching the replicas.