Comment 1 for bug 1655633

Note that it isn't possible to always have required=True/False because some of them depend on other things. See eg: https://github.com/openstack/ironic/blob/31d889a7c45c63664969c89878e88652697b7949/ironic/drivers/modules/ipmitool.py#L80-L92

We (or I) did go down that road and was going to put in some field with required, but at the time, it wasn't clear how we wanted to handle the 'depends' case.

Here's the spec for the existing command. If nothing else, it will be of historical interest :) : http://specs.openstack.org/openstack/ironic-specs/specs/juno-implemented/get-required-driver-info.html
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