adding 'test_tags' param to siab test job

Change-Id: I066d0240cccaa6b070b5cd5ae75a07941bd78a94
diff --git a/jjb/pipeline/siab.groovy b/jjb/pipeline/siab.groovy
index e4f7431..0b9eb91 100644
--- a/jjb/pipeline/siab.groovy
+++ b/jjb/pipeline/siab.groovy
@@ -49,7 +49,7 @@
       steps {
         sh """
             pushd $WORKSPACE/automation-tools/seba-in-a-box
-            make run-tests || true
+            make run-tests ${params.Test_Tags} || true
             popd
             """
             }