adding 'test_tags' param to siab test job

Change-Id: I066d0240cccaa6b070b5cd5ae75a07941bd78a94
diff --git a/jjb/siab.yaml b/jjb/siab.yaml
index 8a13a74..5c50f70 100644
--- a/jjb/siab.yaml
+++ b/jjb/siab.yaml
@@ -40,6 +40,11 @@
           default: 'stable'
           description: 'Latest | Stable'
 
+      - string:
+          name: Test_Tags
+          default: ''
+          description: 'empty for stable and latest for latest'
+
     project-type: pipeline
     concurrent: false
 
@@ -80,6 +85,11 @@
           default: 'latest'
           description: 'Latest | Stable'
 
+      - string:
+          name: Test_Tags
+          default: 'TESTTAGS=latest'
+          description: 'empty for stable and latest for latest'
+
     project-type: pipeline
     concurrent: false