Add EXTRA_VARS param for proposed jobs

Related-Prod:PROD-36997

Change-Id: I4fcadf614e37f3f81c89e10a802635d0f832a145
diff --git a/jobs/templates/heat-cicd-queens-dvr-sl.yml b/jobs/templates/heat-cicd-queens-dvr-sl.yml
index bcaaa84..053851e 100644
--- a/jobs/templates/heat-cicd-queens-dvr-sl.yml
+++ b/jobs/templates/heat-cicd-queens-dvr-sl.yml
@@ -209,6 +209,12 @@
         default: true
         description: 'Works starting from MCP 2019.2.10 or master. Whether to apply saltstack updates on all nodes in cluster before deployment'
         name: UPGRADE_SALTSTACK
+    - text:
+        default: ''
+        description: |-
+          Add env vars for deploy and testing
+        name: EXTRA_VARS
+        trim: 'false'
     pipeline-scm:
       lightweight-checkout: false
       scm: