This commit is an extension of fix for 29325 based on the review comment. In this commit, the quota size for btrfs is kept in `/var/lib/docker/btrfs/quotas` so that a daemon restart keeps quota. Signed-off-by: Yong Tang <yong.tang.github@outlook.com> Upstream-commit: 16328cc207a493ecff0cabc11ebf51e958131418 Component: engine