[VOL-3454] Add new groovy script for soak jobs, template changes

Change-Id: If6406a6e9bf72c0911d93e84ab8199dcdd0994c2
diff --git a/jjb/voltha-test/voltha-nightly-jobs.yaml b/jjb/voltha-test/voltha-nightly-jobs.yaml
index a28f805..f007915 100644
--- a/jjb/voltha-test/voltha-nightly-jobs.yaml
+++ b/jjb/voltha-test/voltha-nightly-jobs.yaml
@@ -366,6 +366,11 @@
           default: '{power-switch}'
           description: "Indicate whether POD has power switch to reboot ONUs/OLT remotely"
 
+      - string:
+          name: testType
+          default: '{test-type}'
+          description: 'Passes the required test category to the groovy script'
+
     concurrent: true
 
     project-type: pipeline