Release keystoneauth for Antelope-1 milestone

This is a library release for keystoneauth for the Antelope-1
milestone. This repository contains commits that have not been releases
for this cycle yet.

If the team is ready to process with this release, please leave a +1
to indicate we should go ahead with the release.

If the team needs more time for things about to merge, or if there is
some other reason a release should not be done at this time, please
leave a -1 with a comment indicating the status. Then update the patch
with the new commit hash to use once the team is ready to do the
release.

$ git log --oneline --no-merges 5.0.0..aa9c5d2
aa9c5d2 OAuth2.0 Client Credentials Grant Flow Support

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: Ib1c929efb1f113bc153798a9c356ad45a0bbfc24

deliverables/antelope/keystoneauth.yaml

@@ -7,3 +7,8 @@ type: library
 repository-settings:
   openstack/keystoneauth:
     tarball-base: keystoneauth1
+releases:
+  - version: 5.1.0
+    projects:
+      - repo: openstack/keystoneauth
+        hash: aa9c5d230f48c0ca4a4fb5dde6c92a07aab287e0