cd.clock.Since(statsLastUpdatedTime) -> cd.clock.Since(cd.statsLastUpdatedTime)
cd.clock.Since(statsLastUpdatedTime) -> cd.clock.Since(cd.statsLastUpdatedTime)

Signed-off-by: Pradyumna Agrawal <03cedce92266521b27ead0d5753a433645ed42a4@vmware.com>

linux-on-ibm-z/cadvisor,linux-on-ibm-z/cadvisor,linux-on-ibm-z/cadvisor