Apply variable to task not the block

- use static import of role since dynamic is not required
- apply variables to the task, not the block
- remove block since it does not appear to be necessary

Change-Id: I9cb0dd38c972ed0e81cbd7228490018d600eaa5c

extraconfig/services/rhsm.yaml

@@ -68,7 +68,6 @@ outputs:
       step_config: ''
       host_prep_tasks:
         - name: Red Hat Subscription Management configuration
+          import_role:
+            name: redhat-subscription
           vars: {get_attr: [RoleParametersValue, value, vars]}
-          block:
-          - include_role:
-              name: redhat-subscription