Release openolt adapter chart version 2.5.6

Change-Id: Ief1fe5e20d44d36bc0b79fb099bd9d38255bdf25
diff --git a/voltha-adapter-openolt/Chart.yaml b/voltha-adapter-openolt/Chart.yaml
index 593b6bc..15a990b 100644
--- a/voltha-adapter-openolt/Chart.yaml
+++ b/voltha-adapter-openolt/Chart.yaml
@@ -14,7 +14,7 @@
 ---
 apiVersion: "v1"
 name: "voltha-adapter-openolt"
-version: "2.5.5"
+version: "2.5.6"
 description: "A Helm chart for Voltha OpenOLT Adapter"
 keywords:
   - "onf"
@@ -32,4 +32,4 @@
     url: "https://www.opennetworking.org"
 
 # appVersion selects the image tag to run
-appVersion: "2.4.12"
+appVersion: "2.4.13"