Updated service to use new XOS core version: 2.1.22

Change-Id: I847c9257b90bb4dc5de99339ce2998bb69db2f19
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 8fecb51..f06a16e 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/hssdb-synchronizer
-FROM xosproject/xos-synchronizer-base:2.1.9
+FROM xosproject/xos-synchronizer-base:2.1.22
 
 COPY xos/synchronizer /opt/xos/synchronizers/hssdb
 COPY VERSION /opt/xos/synchronizers/hssdb/