Updated service to use new XOS core version: 2.1.22

Change-Id: I79ed7148969f3a4e20bd5348ad014851e227837c
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 220518f..067bf7a 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -14,7 +14,7 @@
 
 # xosproject/vsg-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.9
+FROM xosproject/xos-synchronizer-base:2.1.22
 
 COPY xos/synchronizer /opt/xos/synchronizers/vsg-hw
 COPY VERSION /opt/xos/synchronizers/vsg-hw/