Using correct openonu adapter released chart for 2.7

Change-Id: I3ff271fc2f651bf4765dc541abf696ca16de6612
diff --git a/releases/voltha-2.7 b/releases/voltha-2.7
index fcfde86..b8693dd 100644
--- a/releases/voltha-2.7
+++ b/releases/voltha-2.7
@@ -6,7 +6,7 @@
 export VOLTHA_CHART_VERSION=2.8.3
 export VOLTHA_BBSIM_CHART_VERSION=4.2.0
 export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.8.8
-export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.7.15
+export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.7.17
 export BBSIM_SADIS_SERVER_CHART_VERSION=0.1.1
 export ONOS_CLASSIC_CHART_VERSION=0.1.13
 export RADIUS_CHART_VERSION=1.0.2