Change tempest pattern for pike-contrail job

Change-Id: I7c70e2f2113a948377b933742d82c1c6476828e8
diff --git a/jobs/templates/heat-cicd-pike-contrail-stb-sl.yml b/jobs/templates/heat-cicd-pike-contrail-stb-sl.yml
index 0a4ddf0..ea93203 100755
--- a/jobs/templates/heat-cicd-pike-contrail-stb-sl.yml
+++ b/jobs/templates/heat-cicd-pike-contrail-stb-sl.yml
@@ -188,8 +188,8 @@
         name: JENKINS_PIPELINE_BRANCH
         trim: 'false'
     - string:
-        default: ''
-        description: ''
+        default: ^heat_tempest_plugin.tests*|^tempest.api.image*|^tempest_horizon*|^tempest.api.identity*|^tempest.api.network*|^tempest.api.compute*|^tempest.api.volume*|^tempest.scenario*|^tempest.api.object_storage*
+        description: Exclude tungsten tests by default
         name: TEMPEST_PATTERN
         trim: 'false'
     - string: