Updates master job

Change-Id: I4310c6c74153ae346449b8797aad95b39fd68aeb
diff --git a/jjb/repos/tost-onos.yaml b/jjb/repos/tost-onos.yaml
index 302ec14..be32dfc 100644
--- a/jjb/repos/tost-onos.yaml
+++ b/jjb/repos/tost-onos.yaml
@@ -28,6 +28,8 @@
           build-node: '{bigger-build-node}'
       - 'make-test':
           name-extension: 'master'
+          make-test-vars: |
+            ONOS_BRANCH={name-extension}
           make-test-targets: 'docker-build'
           junit-allow-empty-results: true
           build-node: '{bigger-build-node}'