Add Yoga deliverable files

The generated content initializes the Yoga cycle's deliverable files
based on xena deliverables.

Change-Id: Ifb9d3b7b342d652783108fc006688acb97713c51

deliverables/yoga/oslo.messaging.yaml

@@ -0,0 +1,8 @@
+---
+include-pypi-link: true
+launchpad: oslo.messaging
+release-model: cycle-with-intermediary
+team: oslo
+type: library
+repository-settings:
+  openstack/oslo.messaging: {}