CORD-3172 Fix vspgwc for 6.0

Change-Id: I364b25a932b35e4c4e679dd2541e3dc4b2c7cac0
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 3157aa4..08bd6ef 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -15,6 +15,10 @@
 # xosproject/vspgwc-synchronizer
 FROM xosproject/xos-synchronizer-base:candidate
 
+RUN apt-get update && apt-get install -y \
+    net-tools \
+ && rm -rf /var/lib/apt/lists/*
+
 COPY xos/synchronizer /opt/xos/synchronizers/vspgwc
 COPY VERSION /opt/xos/synchronizers/vspgwc/