Update tempest compute flavor_ref/flavor_ref_alt

After Ironic is moved to devstack plugin the tempest is always
executed before ironic devstack plugin. Unfortunatly there is no quick
way to change order.
This change introduce new function ironic_configure_tempest that is
called from Ironic's devstack plugin. It updated flavor_ref and
flavor_ref_alt compute tempest options.

Change-Id: I85a77dd2193bac0ea4bd4fc1985c82d9f598b06b

devstack/lib/ironic

@@ -1044,6 +1044,14 @@ function cleanup_baremetal_basic_ops {
     sudo rmmod nf_nat_tftp || true
 }
 
+function ironic_configure_tempest {
+    local bm_flavor_id
+    bm_flavor_id=$(openstack flavor show baremetal -f value -c id)
+    die_if_not_set $LINENO bm_flavor_id "Failed to get id of baremetal flavor"
+    iniset $TEMPEST_CONFIG compute flavor_ref $bm_flavor_id
+    iniset $TEMPEST_CONFIG compute flavor_ref_alt $bm_flavor_id
+}
+
 # Restore xtrace + pipefail
 $_XTRACE_IRONIC
 $_PIPEFAIL_IRONIC

devstack/plugin.sh

@@ -26,6 +26,9 @@ if is_service_enabled ir-api ir-cond; then
         echo_summary "Starting Ironic"
         start_ironic
         prepare_baremetal_basic_ops
+        if is_service_enabled tempest; then
+            ironic_configure_tempest
+        fi
     fi
 
     if [[ "$1" == "unstack" ]]; then