Ironic has too many properties and enough drivers to make hardcoding them all impractical. Director should only know about power properties (pm_*), capabilities, scheduling properties and node name. Everything else should go to Ironic untouched. This way we won't require package updates every time customers want to use a new option or a new driver.
The first patch is up for review upstream.
This bug did not make the OSP 8.0 release. It is being deferred to OSP 10.
As of OSP9, we no longer hardcode all possible properties. However, we do hardcode drivers, so I'm keeping this bug opened and targeted to Ocata.