Fix EXTRA_VARS for other jobs

Change-Id: Ia044296c9826b31e688b4755c1804f706c92cea2
diff --git a/jobs/templates/bm-b300-cicd-queens-ovs-maas.yml b/jobs/templates/bm-b300-cicd-queens-ovs-maas.yml
index e64a02c..4b0007e 100644
--- a/jobs/templates/bm-b300-cicd-queens-ovs-maas.yml
+++ b/jobs/templates/bm-b300-cicd-queens-ovs-maas.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: