Disable voting ironic dsvm jobs for stable/icehouse
Disable voting ironic dsvm jobs for stable/icehouse

Removes ironic's tempest jobs from stable/icehouse, where they
are currently known to fail.

Change-Id: I00642f365ee5b84a392509acf3d540f8cda79b4e

noorul/os-project-config,citrix-openstack/project-config,osrg/project-config,dongwenjuan/project-config,osrg/project-config,coolsvap/project-config,dongwenjuan/project-config,anbangr/osci-project-config,open-switch/infra_project-config,noorul/os-project-config,openstack-infra/project-config,openstack-infra/project-config,coolsvap/project-config,citrix-openstack/project-config,Tesora/tesora-project-config,open-switch/infra_project-config,Tesora/tesora-project-config,anbangr/osci-project-config