in some cases: s3.session_token/AWS_TOKEN will be expired after hours, and may be upload snapshot job will failed if data is big large; as same reason, repo will be expired too when RepositoryMgr exec repo ping so it need support alter s3 repo properties about ak/sk/token and update upload snapshot job properties to continue backup. Signed-off-by: nextdreamblue <zxw520blue1@163.com>