@Override
  public void memberShutdown(ID mbr, String reason) {}
Check to see if a member is available

@param initiator member who initiated this check
@param cv the view we're basing the check upon
@param isFinalCheck whether the member should be kicked out if it fails the check
@param mbr the member to check
@param reason why we're doing this check
@return true if the check passes
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/fd/GMSHealthMonitor.java