Using images for VOLTHA-2.6 release

Change-Id: I7d9d34948214caff390f150c5e48e3427b225520
diff --git a/voltha/Chart.yaml b/voltha/Chart.yaml
index 5e7600d..75a40bf 100644
--- a/voltha/Chart.yaml
+++ b/voltha/Chart.yaml
@@ -14,7 +14,7 @@
 ---
 apiVersion: "v1"
 name: "voltha"
-version: "2.7.1"
+version: "2.7.2"
 description: "A Helm chart for Voltha based on K8S resources in Voltha project"
 keywords:
   - "onf"
@@ -33,4 +33,4 @@
 
 # app version applies to multiple components with potentially different
 # container image versions
-appVersion: "2.5"
+appVersion: "2.6"