Remove old Stats interface in libcontainers cgroups package. Changed Stats to use unit64 instead of int64 to prevent integer overflow issues. Updated unit tests. Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)