@Override protected void validateAutoTierPolicy(String autoTierPolicyId,UnManagedVolume unManagedVolume,VirtualPool vPool){
  return;
}

@ Override protected void validateAutoTierPolicy ( String autoTierPolicyId , UnManagedVolume unManagedVolume , VirtualPool vPool ) { return ; }
there is no validation required for snaps . hence returning void argument .
