Release Yoga RC1 for solum

This patch proposes an RC1 release for solum to get any merged
changes out prior to the RC1 deadline for Yoga 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 Thursday, March 10th.

Signed-off-by: Elod Illes <elod.illes@est.tech>
Change-Id: I521a41d003ad35821bfb8f9bd88ac9329299775a

deliverables/yoga/solum.yaml

@@ -5,3 +5,11 @@ team: solum
 type: service
 repository-settings:
   openstack/solum: {}
+releases:
+  - version: 12.0.0.0rc1
+    projects:
+      - repo: openstack/solum
+        hash: b56fd57651e8c4dfb6b1eca56b597bfd9779bae2
+branches:
+  - name: stable/yoga
+    location: 12.0.0.0rc1