Add repo settings and remove highlights for Austin

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: Id892d0dfecf922876459c687c2943e86701b4cb6

deliverables/austin/nova.yaml

@@ -8,3 +8,5 @@ releases:
     projects:
       - repo: openstack/nova
         hash: 685e2a1b4b359c1f7e8ec72817c2c420f2b26a18
+repository-settings:
+  openstack/nova: {}

deliverables/austin/swift.yaml

@@ -4,7 +4,9 @@ team: swift
 type: service
 release-model: cycle-with-intermediary
 releases:
-  - version: "1.1.0"
+  - version: 1.1.0
     projects:
       - repo: openstack/swift
         hash: f494fc37a6a7e502a49fe177de7a412d4063cd0b
+repository-settings:
+  openstack/swift: {}