[neutron] Create yoga branch for client and non-client libs

This creates the stable/yoga branch for all client and non-client
libraries now that we are past the lib freeze on February 24th.

If the 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 4th.

Change-Id: I7a4970b389087f21f74bb53f4062ed09f57d8399

deliverables/yoga/neutron-lib.yaml

@@ -31,3 +31,6 @@ releases:
     projects:
       - repo: openstack/neutron-lib
         hash: 6dfa4f5dd6b672d529f891e67da1377969d687cc
+branches:
+  - name: stable/yoga
+    location: 2.20.0

deliverables/yoga/os-ken.yaml

@@ -19,3 +19,6 @@ releases:
     projects:
       - repo: openstack/os-ken
         hash: 58a39392397cd01e174c4736fa31a9a5617f1ff0
+branches:
+  - name: stable/yoga
+    location: 2.3.1

deliverables/yoga/ovsdbapp.yaml

@@ -22,3 +22,6 @@ releases:
     projects:
       - repo: openstack/ovsdbapp
         hash: dc15bfd5729eb9f2b404288a4aa901c318274507
+branches:
+  - name: stable/yoga
+    location: 1.15.1

deliverables/yoga/python-neutronclient.yaml

@@ -15,3 +15,6 @@ releases:
     projects:
       - repo: openstack/python-neutronclient
         hash: 6ca3341352e17f8ea4e79627c5a96c519b73a7b6
+branches:
+  - name: stable/yoga
+    location: 7.8.0