CORD-2919 add unit tests for fabric synchronizer

Change-Id: Ic87748db3d2893819ac3c07940e41b4de8c29510
diff --git a/xos/unittest.cfg b/xos/unittest.cfg
new file mode 100644
index 0000000..48ea867
--- /dev/null
+++ b/xos/unittest.cfg
@@ -0,0 +1,4 @@
+[unittest]
+plugins=nose2-plugins.exclude
+code-directories=synchronizer
+                 steps