ironic: grenade.*multitenant job use agent_ssh
ironic: grenade.*multitenant job use agent_ssh

Use the 'agent_ssh' deploy driver. This also requires using the
wholedisk image-type.

The multitenant tests do not currently work with 'pxe_ssh'. Switch to
using 'agent_ssh', like the current multitenant gate job.

Change-Id: I8e20bf7447068560736f6599ff16bb1e40d81208

openstack-infra/project-config,openstack-infra/project-config