@Override
    public void setReplicaDisabledState(ReplicaId replicaId, boolean disable) {
      if (disable) {
        disabledReplicas.add(replicaId);
      } else {
        disabledReplicas.remove(replicaId);
      }
    }
Ctor for MockClusterParticipant with arguments to override return value of some methods.
@param setSealStateReturnVal if not null, use this value to override result of setReplicaSealedState(). If null,
                             go through standard workflow in the method.
@param setStopStateReturnVal if not null, use this value to override result of setReplicaStoppedState(). If null,
                             go through standard workflow in the method.
ambry-store/src/test/java/com/github/ambry/store/StorageManagerTest.java