Using openonu-py 2.6.0

Change-Id: I5663ffe2cff952be4b30b94568c3046ae40ee4a2
diff --git a/releases/voltha-2.6 b/releases/voltha-2.6
index 7b85f74..277a330 100644
--- a/releases/voltha-2.6
+++ b/releases/voltha-2.6
@@ -6,7 +6,7 @@
 export VOLTHA_CHART_VERSION=2.7.2
 export VOLTHA_BBSIM_CHART_VERSION=4.1.6
 export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.7.1
-export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.6.9
+export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.6.10
 export BBSIM_SADIS_SERVER_CHART_VERSION=0.0.3
 export ONOS_CLASSIC_CHART_VERSION=0.1.11
 export RADIUS_CHART_VERSION=1.0.2