CORD-1033 Build and publish service synchronizers on corddev

Change-Id: Id6e06aa7df3cd26c2fa9dc85fb0af151d64bc6ef
diff --git a/xos/synchronizer/Dockerfile.synchronizer b/xos/synchronizer/Dockerfile.synchronizer
index dd61c31..1c3efb6 100644
--- a/xos/synchronizer/Dockerfile.synchronizer
+++ b/xos/synchronizer/Dockerfile.synchronizer
@@ -1,4 +1,4 @@
-FROM xosproject/xos-synchronizer-base
+FROM xosproject/xos-synchronizer-base:candidate
 
 ADD . /opt/xos/synchronizers/vrouter