Ensure CPU quota/period updates are sent to runc

Fixes an issue where if cpu quota/period is sent via the update API, the
values are updated in the stored container data but not actually sent to
the running container.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 86ba63db82e87c943c9dee52559118e46f23defc
Component: engine

components/engine/daemon/update_linux.go

@@ -30,6 +30,13 @@ func toContainerdResources(resources container.Resources) *libcontainerd.Resourc
 		period = uint64(100 * time.Millisecond / time.Microsecond)
 		quota = resources.NanoCPUs * int64(period) / 1e9
 	}
+	if quota == 0 && resources.CPUQuota != 0 {
+		quota = resources.CPUQuota
+	}
+	if period == 0 && resources.CPUPeriod != 0 {
+		period = uint64(resources.CPUPeriod)
+	}
+
 	r.CPU.Period = &period
 	r.CPU.Quota = &quota