Add inputfile and outputfile to script
Add inputfile and outputfile to script

We want to allow container-storage-setup to take an input file and
an output file, so that it can be used by other container runtimes.

For ocid we plan on using something like

container-storage-setup /etc/sysconfig/ocid-storage-setup /etc/sysconfig/ocid-storage

Defaults will still be based on docker.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #195
Approved by: rhvgoyal

shishir-a412ed/docker-storage-setup,thescriptbender/container-storage-setup