setting siab-latest to run just test1

Change-Id: If8b146b949f1572688c88fcff9828a9d9e3d28f0
diff --git a/jjb/siab.yaml b/jjb/siab.yaml
index 5c50f70..e3baf22 100644
--- a/jjb/siab.yaml
+++ b/jjb/siab.yaml
@@ -87,7 +87,7 @@
 
       - string:
           name: Test_Tags
-          default: 'TESTTAGS=latest'
+          default: 'TESTTAGS=test1'
           description: 'empty for stable and latest for latest'
 
     project-type: pipeline