!3847 nvmet: nul-terminate the NQNs passed in the connect command

Merge Pull Request from: @ci-robot 
 
PR sync from: Cheng Yu <serein.chengyu@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2OK5QLYZZK7XQN5BJ6ZM4PIZX6O6XSGZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8H4UJ 
 
Link:https://gitee.com/openeuler/kernel/pulls/3847

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>