Update fedora image for ironic driver
Update fedora image for ironic driver

Only fedora 24 is the default release used in the
fedora-minimal elements. [1]

[1] I0ac0d0767d4de9d28ae86d1344fd7c9d8876e5a1

Change-Id: I089baf0105b68bcd13aa86fb683c6d240e560107

ArchiFleKs/magnum,openstack/magnum,ArchiFleKs/magnum,openstack/magnum