[OpenstackSDK] Create for all client and non-client lib wallaby branch

This creates the stable/wallaby branch for all client and non-client libraries
now that we are past the lib freeze on March 11.

If a team wants to wait for a specific patch to make it to the library,
someone from the team can -1 the patch to have it held,or update that
patch with a different commit SHA.

Patches with no response will be merged by Friday, March 19.

Change-Id: I0d9e2637dc5d3dbbb7fd3fd9649de1d7806832be

deliverables/wallaby/cliff.yaml

@@ -19,3 +19,6 @@ releases:
     projects:
       - repo: openstack/cliff
         hash: 117a1005dc208b55aba93652856c8001b28a48ce
+branches:
+  - name: stable/wallaby
+    location: 3.7.0

deliverables/wallaby/openstacksdk.yaml

@@ -27,3 +27,6 @@ releases:
     projects:
       - repo: openstack/openstacksdk
         hash: 964fec6a51f615a4ff23efcec8d923b54f009c8a
+branches:
+  - name: stable/wallaby
+    location: 0.55.0

deliverables/wallaby/osc-lib.yaml

@@ -15,3 +15,6 @@ releases:
     projects:
       - repo: openstack/osc-lib
         hash: 2b7a679a4296c45fbc2fea152e3b51029a201143
+branches:
+  - name: stable/wallaby
+    location: 2.3.1