Update VERSION and XOS parent container

Change-Id: Ic70c90dbc8b0ceca65dddf270b77dbfe5d9738eb
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 8485c63..1ff126f 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/vmme-synchronizer
-FROM xosproject/xos-synchronizer-base:2.0.0
+FROM xosproject/xos-synchronizer-base:2.1.9
 
 COPY xos/synchronizer /opt/xos/synchronizers/vmme
 COPY VERSION /opt/xos/synchronizers/vmme/