[SEBA-504] Not disabling ONU as result of an ONOS event

Change-Id: I535660cf26338d434f78b6677dd68326ec57425e
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 0cf80bc..dcaa44a 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,7 @@
 
 # xosproject/att-workflow-driver-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.38
+FROM xosproject/xos-synchronizer-base:2.1.55
 
 COPY xos/synchronizer /opt/xos/synchronizers/att-workflow-driver
 COPY VERSION /opt/xos/synchronizers/att-workflow-driver/