Update VERSION and XOS parent container

Change-Id: Ieb4b19be8231ee6d34b9f6bd2136be907d3f3d7c
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index c71235a..522a582 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,7 @@
 
 # xosproject/hippie-oss-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.0.0
+FROM xosproject/xos-synchronizer-base:2.1.9
 
 COPY xos/synchronizer /opt/xos/synchronizers/hippie-oss
 COPY VERSION /opt/xos/synchronizers/hippie-oss/