add synchronizer and tosca files for vPGWC

Change-Id: I3f02594390a50d01820bcddb76f2a0a17e768db1
diff --git a/xos/synchronizer/model-deps b/xos/synchronizer/model-deps
new file mode 100755
index 0000000..0967ef4
--- /dev/null
+++ b/xos/synchronizer/model-deps
@@ -0,0 +1 @@
+{}