test(robot): fix Test system upgrade with a new storage class being default on v2 volume

Signed-off-by: Yang Chiu <yang.chiu@suse.com>

Author: yangchiu

e2e/tests/negative/upgrade_with_new_default_storageclass.robot

@@ -27,6 +27,7 @@ Test system upgrade with a new storage class being default
     And Check Longhorn CRD removed
 
     When Install Longhorn stable version
+    And Enable v2 data engine and add block disks
     And Create storageclass longhorn-rep-2 with    dataEngine=${DATA_ENGINE}    numberOfReplicas=2
     And Set storageclass longhorn-rep-2 as default
     And Remove default from storageClass longhorn