Upgrade helm version to 2.16.6

Issue-ID: CIMAN-33
Change-Id: Id8078bb73209ec0c0acda69480f27b03691e5be3
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
diff --git a/packer/provision/helm.yaml b/packer/provision/helm.yaml
index daed681..6b000c3 100644
--- a/packer/provision/helm.yaml
+++ b/packer/provision/helm.yaml
@@ -7,7 +7,7 @@
 
   vars:
     kubectl_version: 1.11.2
-    helm_version: 2.12.3
+    helm_version: 2.16.6
 
   tasks:
     - name: 'Install kubectl {{kubectl_version}}'
@@ -36,4 +36,3 @@
           command: 'which helm'
         - name: 'Check kubectl.'
           command: 'which kubectl'
-