Updated service to use new XOS core version: 2.1.22

Change-Id: Ia261ac78a9dae10c265b8cc8415a18ee93a1f180
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index a201914..d2ec0e6 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -14,7 +14,7 @@
 
 # xosproject/exampleservice-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.21
+FROM xosproject/xos-synchronizer-base:2.1.22
 
 COPY xos/synchronizer /opt/xos/synchronizers/exampleservice
 COPY VERSION /opt/xos/synchronizers/exampleservice/