Bumping openonu-go and openolt chart versions for VOLTHA-2.7

Change-Id: I0cd02fdcb2870694f23132102e9d0ef0290963ad
diff --git a/releases/voltha-2.7 b/releases/voltha-2.7
index bbbd4a8..43ba106 100644
--- a/releases/voltha-2.7
+++ b/releases/voltha-2.7
@@ -5,8 +5,8 @@
 
 export VOLTHA_CHART_VERSION=2.8.3
 export VOLTHA_BBSIM_CHART_VERSION=4.2.0
-export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.8.7
-export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.7.13 # needs update once released
+export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.8.8
+export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.7.14
 export BBSIM_SADIS_SERVER_CHART_VERSION=0.1.1
 export ONOS_CLASSIC_CHART_VERSION=0.1.13
 export RADIUS_CHART_VERSION=1.0.2
@@ -20,6 +20,3 @@
 # Also we need to specify the tag for voltha/voltha-onos image since this is
 # not in the ONOS chart.
 export EXTRA_HELM_FLAGS="--set defaults.image_tag=null,images.onos.tag=master " # use the correct VOLTHA-ONOS image once merged
-
-# remove once the components have been released
-EXTRA_HELM_FLAGS+="--set images.adapter_open_onu_go.tag=master "