(VOL-4955)added max_grpc_client_retry parameter

max_grpc_client_retry is the maximum number of times
the olt adaptor should retry to the core in case the grpc request fails due to request time out or voltha core being unavailable
Change-Id: Ib3e722853c6479d84e1fadca4182f698fa6f61ac
(retrying for pipeline)
diff --git a/voltha-stack/Chart.yaml b/voltha-stack/Chart.yaml
index 5a8e25a..88a7005 100644
--- a/voltha-stack/Chart.yaml
+++ b/voltha-stack/Chart.yaml
@@ -27,11 +27,11 @@
     url: "https://www.opennetworking.org"
 name: voltha-stack
 appVersion: "2.12"
-version: 2.12.0
+version: 2.12.1
 dependencies:
   - name: voltha
     repository: file://../voltha
-    version: 2.12.0
+    version: 2.12.2
     condition: voltha.enabled
   - name: voltha-adapter-openonu
     repository: file://../voltha-adapter-openonu
@@ -39,7 +39,7 @@
     condition: voltha-adapter-openonu.enabled
   - name: voltha-adapter-openolt
     repository: file://../voltha-adapter-openolt
-    version: 2.11.5
+    version: 2.12.1
     condition: voltha-adapter-openolt.enabled
   - name: voltha-go-controller
     repository: file://../voltha-go-controller