Replate image_name with name in glance_image_signed

The name argument is mandatory, use it instead of image_name.


Change-Id: I7a8f71bb7d417799316b5f9c7f90f9ebe22609df
Related-Prod: PROD-26620
diff --git a/runtest/barbican_sign_image.sls b/runtest/barbican_sign_image.sls
index 7e48f8a..f3a570b 100644
--- a/runtest/barbican_sign_image.sls
+++ b/runtest/barbican_sign_image.sls
@@ -6,8 +6,8 @@
 {%- for image in images['images'] %}
 barbican_sign_image_{{ image['name'] }}:
   barbicanv1.glance_image_signed:
+    - name: {{ image['name'] }}
     - cloud_name: {{ tempest.keystone_profile_admin }}
-    - image_name: {{ image['name'] }}
     - pk_fname: {{ tempest.test_cert_key }}
     - secret_name: {{ secret_name }}
     - out_fname: /tmp/signature_{{ image['name'] }}