Update cli.py docker function to reflect changes made to DockerCli in 11f182.
Update cli.py docker function to reflect changes made to DockerCli in 11f182.

- References 11f182d31de4c265e8175b79e1771108defacc93.

crcresearch/smartcontainers,crcresearch/smartcontainers,crcresearch/smartcontainers,Omegaice/smartcontainers,charlesvardeman/smartcontainers,Omegaice/smartcontainers,Omegaice/smartcontainers