stable -> 2.2.0

Change-Id: I44e91be5258040fe0bf42bc83dc4d47d34ed31c5
diff --git a/jobs.yaml b/jobs.yaml
index a987ca2..9ec1240 100644
--- a/jobs.yaml
+++ b/jobs.yaml
@@ -44,7 +44,7 @@
     flavor:
       - trusty32server
       - trusty64server
-    branch: '2.2.0rc2'
+    branch: '2.2.0'
     tag: '-stable'
     jobs:
       - 'mininet-{flavor}{tag}'