[VOL-3308] support helm 3 for voltctl

Change-Id: I25d64d30ce44d9e23d74bbf301113b8e7df613f4
(cherry picked from commit 6519b51bb4f3b58f23f33d079aa252ab422eb128)
diff --git a/tests/functional/voltctl.yaml b/tests/functional/voltctl.yaml
index 0f0554d..7f39ffe 100644
--- a/tests/functional/voltctl.yaml
+++ b/tests/functional/voltctl.yaml
@@ -14,7 +14,7 @@
 
 ---
 
-apiVersion: apps/v1beta2
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: voltctl