Description of problem:

It's not very easy to update override order via `hammer sc-param update`. Hammer handles --override-value-order as a simple string parameter. That complicates passing newlines, which are primary delimiters for override order items.

Users currently need to use ugly constructions like:

hammer sc-param update --id 129 --override true --override-value-order "$(echo -e "fqdn\nlifecycle_environment,hostgroup")"

Hammer should provide simpler way of updating that field. One of options is using json format:

--override-value-order="['fqdn', 'lifecycle_environment,hostgroup']"