Declines a handshake request.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/organizations/decline-handshake.html
| aws organizations decline-handshake --handshake-id h-examplehandshakeid111 |
| list-handshakes-for-organization — AWS CLI 1.16.12 Command Reference : http://docs.aws.amazon.com/cli/latest/reference/organizations/decline-handshake.html |