Do not build any ramdisks in Ironic grenade jobs
Do not build any ramdisks in Ironic grenade jobs

Building a deploy ramdisk makes already heavy job even more heavy
and prone to transient failures in various mirrors. We cover ramdisk
building in IPA jobs anyway.

Change-Id: Ic27616a4384f7ca12e7915b0419b414c9700e4df

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config