Release ec2-api RC1 for Antelope

This proposed a RC1 release for ec2-api to get any merged changes
out prior to the RC1 deadline for Antelope going into effect.

If the team is ready to proceed, please leave a +1 to acknowledge this
release and we will process right away. If the team is working on any
final merges, leave a -1 with some detail on the status and update the
patch with the new commit hash to use when ready.

Patches with no response will be merged by early Friday, March 03.

$ git log --oneline --no-merges 15.0.0.0rc1..45ea70a
5971b2a increase default timeout
0ae0b9a Add some automatic steps & Fix SQL in install scripts
a17f4bd Add some automatic steps & Fix SQL in install scripts
16b27e6 Correct queue declaration in Zuul config
24a9c69 doc: Fix docs about installation
750bc48 Drop Babel from reqs
6dbe766 Cleanup py27 support
d641766 Remove logic for Python <= 2.6
e2de35f Switch to 2023.1 Python3 unit tests and generic template name
af83b08 Start generating our own key pairs

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: Ieebb458a2fb996b6d0ede79577ab427fba315fcc

deliverables/antelope/ec2-api.yaml

@@ -6,3 +6,11 @@ team: ec2-api
 type: service
 repository-settings:
   openstack/ec2-api: {}
+releases:
+  - version: 16.0.0.0rc1
+    projects:
+      - repo: openstack/ec2-api
+        hash: 27c479ab0cc6ce14d93d9aca9155209625f4a8c8
+branches:
+  - name: stable/2023.1
+    location: 16.0.0.0rc1