SEBA-513 Cleanup errors reported by xproto validator

Change-Id: Ib985d3431492ff209e2b386cd098d41317c8624b
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 356ac6b..4ff68ac 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,8 @@
 # docker build -t xosproject/rcord-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/rcord-synchronizer
-FROM xosproject/xos-synchronizer-base:2.2.5
+
+FROM xosproject/xos-synchronizer-base:2.2.11
 
 COPY xos/synchronizer /opt/xos/synchronizers/rcord
 COPY VERSION /opt/xos/synchronizers/rcord/