Add image_ref_alt

Add image_ref_alt to tempest config parameters

Change-Id: I7de166a27b1720a6729b144d08c1d7ea41331833
diff --git a/metadata/service/tempest/init.yml b/metadata/service/tempest/init.yml
index d59a7e0..86be784 100644
--- a/metadata/service/tempest/init.yml
+++ b/metadata/service/tempest/init.yml
@@ -21,9 +21,11 @@
       test_target: ${_param:tempest_test_target}
       keystone_profile_admin: admin_identity
       convert_to_uuid:
-        image_name: ${glance:client:identity:admin_identity:image:cirros:name}
-        flavor_name: 'm1.extra_tiny_test'
-        flavor_alt_name: 'm1.tiny_test'
+        compute:
+          image_ref: ${glance:client:identity:admin_identity:image:cirros:name}
+          flavor_ref: 'm1.extra_tiny_test'
+          flavor_ref_alt: 'm1.tiny_test'
+          image_ref_alt: ${glance:client:identity:admin_identity:image:cirros:name}
       heat_plugin:
         skip_scenario_test_list: ${_param:runtest_heat_plugin_skip_scenario_test_list}
         skip_functional_test_list: ${_param:runtest_heat_plugin_skip_functional_test_list}