CORD-1033 Build and publish service synchronizers on corddev

Change-Id: I656f447671a4858a7968f0f2644c8ca97674f8df
diff --git a/xos/synchronizer/Dockerfile.synchronizer b/xos/synchronizer/Dockerfile.synchronizer
index d31db64..b3b279a 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/fabric