Add repo settings and remove highlights for Mitaka

We've deprecated per-release highlights and are now removing them.
We also now require repository-settings for deliverables. This adds
the one and removes the other.

Change-Id: I91e5d5b1ce0ca78c242d65a6f4aa90473b28ce79

deliverables/mitaka/django-openstack-auth.yaml

@@ -9,28 +9,17 @@ releases:
     projects:
       - repo: openstack/django_openstack_auth
         hash: 3715a5f445254520f951a5d791fb5eeeeb2b2b57
-    highlights: >
-        This release adds support for obtaining domain scoped
-        tokens and using them in policy checks. This is required
-        for full keystone v3 support.
   - version: 2.1.1
     projects:
       - repo: openstack/django_openstack_auth
         hash: e7814b2b8eb7e835a076d2b59ec106ce3bf3bd71
-    highlights: >
-        This release restores backward compatibility with Liberty
-        versions of Horizon. Supports using keystoneauth rather
-        than similar functionality in keystoneclient.
   - version: 2.2.0
     projects:
       - repo: openstack/django_openstack_auth
         hash: 9de5d87becab6117009b1e7327bc309f5e9a9042
-    highlights: >
-        This release adds Django 1.9 support and provides several
-        bug fixes.
   - version: 2.2.1
     projects:
       - repo: openstack/django_openstack_auth
         hash: 9574d982199f1df8826fa907ff183266d71a6c51
-    highlights: >
-        Translation import for Mitaka
+repository-settings:
+  openstack/django_openstack_auth: {}