set storage session to None after session destroy Signed-off-by: dylan-fan <289765648@qq.com>
set storage session to None after session destroy
Signed-off-by: dylan-fan <47a35c714a3a0bddf679668182d042b75ae709ca@qq.com>

FederatedAI/FATE,FederatedAI/FATE,FederatedAI/FATE