Updated service to use new XOS core version: 2.1.22

Change-Id: I15d96043b855508f81e93d80bb51d86d41277500
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 316f548..13ac9b2 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -14,7 +14,7 @@
 
 # xosproject/addressmanager-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.9
+FROM xosproject/xos-synchronizer-base:2.1.22
 
 COPY xos/synchronizer /opt/xos/synchronizers/addressmanager
 COPY VERSION /opt/xos/synchronizers/addressmanager/