jjb reference non-existent demo dublin branch

Change-Id: I39c40214ad99fe23be0ce5a7b43aedc99e382240
Issue-ID: INT-1062
Signed-off-by: Yang Xu <yang.xu3@huawei.com>
diff --git a/jjb/testsuite/testsuite.yaml b/jjb/testsuite/testsuite.yaml
index d41cc6d..5ea9de0 100644
--- a/jjb/testsuite/testsuite.yaml
+++ b/jjb/testsuite/testsuite.yaml
@@ -26,8 +26,8 @@
     checkout-dir2: 'testsuite/heatbridge'
 
     extra-project3: 'demo'
-    extra-branch3: '{branch}'
-    extra-refspec3: 'refs/heads/{branch}'
+    extra-branch3: 'master'
+    extra-refspec3: 'refs/heads/master'
     checkout-dir3: 'demo'
 
     stream: