Operation with CL=EACH_QUORUM doesn't succeed when a replica is down (RF=3)

  DatacenterSyncWriteResponseHandler#assureSufficientLiveNodes()
     ...
     ...
        // Throw exception if any of the DC doesn't have livenodes to accept write.
        for (String dc: strategy.getDatacenters())
        {
        	if (dcEndpoints.get(dc).get() != responses.get(dc).get())
                throw new UnavailableException();
        }

      if (dcEndpoints.get(dc).get() < responses.get(dc).get())