Explicitly set ramdisk type
Explicitly set ramdisk type

The ironic-inspector-base job is based on ironic-base job which
will default to dib.
To prevent breaking the ironic-inspector CI we set the ramdisk
type to tinyipa for now and we'll convert the jobs here later.

Change-Id: If2be23d4e59f4c4821005b037a6002428b2e7eb4

openstack/ironic-inspector,openstack/ironic-inspector