[18.09 backport] update just installer of containerd to 1.2.1 Upstream-commit: 6c633fbe18e0a69db3db1aed28b3fa23bc795dfe Component: engine
[18.09 backport] update just installer of containerd to 1.2.1 Upstream-commit: 6c633fbe18e0a69db3db1aed28b3fa23bc795dfe Component: engine