Add support for <role>_ingress_class_name

Change-Id: I7b37dda12036e7a9e0ada33fdfe6d45511b0ee18
(cherry picked from commit c139abc1d338f923ab5d528460d2f4906b78e2e2)
diff --git a/roles/placement/defaults/main.yml b/roles/placement/defaults/main.yml
index ac540b3..18ef0e4 100644
--- a/roles/placement/defaults/main.yml
+++ b/roles/placement/defaults/main.yml
@@ -19,5 +19,8 @@
 placement_helm_release_namespace: openstack
 placement_helm_values: {}
 
+# Class name to use for the Ingress
+placement_ingress_class_name: "{{ atmosphere_ingress_class_name }}"
+
 # List of annotations to apply to the Ingress
 placement_ingress_annotations: {}
diff --git a/roles/placement/tasks/main.yml b/roles/placement/tasks/main.yml
index 0d664ec..7c6b6a3 100644
--- a/roles/placement/tasks/main.yml
+++ b/roles/placement/tasks/main.yml
@@ -30,3 +30,4 @@
     openstack_helm_ingress_service_name: placement-api
     openstack_helm_ingress_service_port: 8778
     openstack_helm_ingress_annotations: "{{ placement_ingress_annotations }}"
+    openstack_helm_ingress_class_name: "{{ placement_ingress_class_name }}"