cli: Don't load config file when displaying help for sub-commands.
cli: Don't load config file when displaying help for sub-commands.

If the user simply want to see a usage statement for a sub-command, the
config file should not be loaded.

Related to #137.

Signed-off-by: James O. D. Hunt <348fbaadfbada55ea105602bf5609e23ac1c4898@intel.com>

gorozco1/runtime,gorozco1/runtime,clearcontainers/runtime,chavafg/runtime,devimc/runtime,clearcontainers/runtime,devimc/runtime,chavafg/runtime