Revert "Revert "Set cpu_mode/cpu_model for E\ models""

This reverts commit d34bbc5419b12135de16038b4b13758f3ab615eb.

Change-Id: If92b128a83ba6b336a5f2a774201c5ac59ebf0f2
diff --git a/classes/cluster/virtual-mcp-pike-ovs/openstack/compute.yml b/classes/cluster/virtual-mcp-pike-ovs/openstack/compute.yml
index a7817f4..3fd3bce 100644
--- a/classes/cluster/virtual-mcp-pike-ovs/openstack/compute.yml
+++ b/classes/cluster/virtual-mcp-pike-ovs/openstack/compute.yml
@@ -37,6 +37,11 @@
           - host: ${_param:openstack_control_node01_address}
           - host: ${_param:openstack_control_node02_address}
           - host: ${_param:openstack_control_node03_address}
+      # Compute nodes on devcloud can have different CPUs, we need this
+      # to make sure live migration always work even when cmp VMs are on different computes
+      cpu_mode: custom
+      libvirt:
+        cpu_model: kvm64
   linux:
     network:
       bridge: openvswitch