When `psFormat` is used in the docker client config json, if the output
is non-standard it breaks some of the completion handling for
containers.
This fixes that by ensuring that calls to `ps` use the default/standard
formatting by calling `docker ps --format 'table'`
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 8b38343e46
Component: cli