Reverted back signature version

Signature version v2 fails to authenticate against the ELB api

err:  { [SignatureDoesNotMatch: Signature not yet current: 20130730T204752Z is still later than 20130730T204123Z (20130730T203623Z + 5 min.)]
  message: 'Signature not yet current: 20130730T204752Z is still later than 20130730T204123Z (20130730T203623Z + 5 min.)',
  code: 'SignatureDoesNotMatch',
  name: 'SignatureDoesNotMatch',
  statusCode: 403,
  retryable: false }