SEBA-206 Report OLT link connectivity in OLTDevice model

Change-Id: Icb3a75d719adac6d8eea139fe9d00d34a11baecb
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index b8a9b43..d6332ee 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,7 @@
 
 # xosproject/volt-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.2.18
+FROM xosproject/xos-synchronizer-base:3.0.5
 
 COPY xos/synchronizer /opt/xos/synchronizers/volt
 COPY VERSION /opt/xos/synchronizers/volt/