[RFE] support GET /v1/drivers/?fields=...

[Ruby Loo]

Now that the drivers have a lot of interface-related fields, it would be useful to allow requests for lists of drivers, to specify the fields they'd like in the response. This is similar to what is done with the other resources: nodes, chassis, ports, and port groups.

Support the 'fields' query parameter to the GET /v1/drivers/ request.

This involves a microversion bump.

python-ironicclient should be updated as well -- python API and OSC CLI. (Not ironic CLI since it is deprecated.)

[Madhuri Kumari (madhuri-rai07)]

Hi Ruby,

Can I work on this bug in case you're not working on it?

Thanks,
Madhuri

[Ruby Loo (rloo)]

Hi Madhuri, sure, it is all yours. Thanks!

[Ruby Loo (rloo)]

I was going to ask for a spec because API changes require a spec, but there should really be minimal changes for this. The API and osc CLI should be similar/consistent with how this is handled for the other ironic resources. Will see what others think, I'm good w/o one.

[Ruby Loo (rloo)]

Julia is also good with approving this w/o a spec: around 14:27, http://eavesdrop.openstack.org/irclogs/%23openstack-ironic/%23openstack-ironic.2017-11-14.log.html