Avoid VM configuration with Ironic hardware mode.

If "IRONIC_HARDWARE" is True, VMs are not required when using Ironic.

Change-Id: I33ba294f1e2ea583cd4c24c392637a4ee60a39ab

lib/nova_plugins/hypervisor-ironic

@@ -56,6 +56,8 @@ function configure_nova_hypervisor {
 function install_nova_hypervisor {
     if ! is_service_enabled neutron; then
         die $LINENO "Neutron should be enabled for usage of the Ironic Nova driver."
+    elif is_ironic_hardware; then
+        return
     fi
     install_libvirt
     if [[ "$IRONIC_VM_LOG_CONSOLE" == "True" ]] && is_ubuntu; then