Release manila 12.1.2 off of stable/wallaby

Producing this release to facilitate a final
release from stable/victoria which contains
bugfixes that this release stream also needs

% git log --oneline --no-merges 12.1.1..f5b2cd
596f01905 [NetApp] Fix default thin_provisioned volumes on AFF
afe3fd308 Use tox 3.1.1 fixes

Change-Id: Ie625b17713a9bfb6b89e75e3d5824ad3ed613da4

deliverables/wallaby/manila.yaml

@@ -48,6 +48,10 @@ releases:
     projects:
       - repo: openstack/manila
         hash: e1e9670cfbf0069c95cfc777d8abdd9c2c379950
+  - version: 12.1.2
+    projects:
+      - repo: openstack/manila
+        hash: f5b2cdc23d61b41a739d4a74b477fec63972f1af
 branches:
   - name: stable/wallaby
     location: 12.0.0.0rc1