[CORD-1943] Adding docs for service graph

Change-Id: I2dcfa69cf882f6bfccafeda2a4b83ded6eaca6b0
(cherry picked from commit 932aa4156360c9e0ee5cdfea3a3b03f759c9895f)
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 5d7ca56..369b405 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -36,11 +36,12 @@
     * [Configuring XOS](xos/modules/xosconfig.md)
     * [GUI Development](xos-gui/developer/README.md)
         * [Quickstart](xos-gui/developer/quickstart.md)
-        * [Tests](xos-gui/developer/tests.md)
+        * [Service Graph](xos-gui/developer/service_graph.md)
         * [GUI Extensions](xos-gui/developer/gui_extensions.md)
         * [GUI Internals](xos-gui/architecture/README.md)
             * [Module Strucure](xos-gui/architecture/gui-modules.md)
             * [Data Sources](xos-gui/architecture/data-sources.md)
+        * [Tests](xos-gui/developer/tests.md)
     * [Unit Tests](xos/dev/unittest.md)
 * [Testing CORD](cord-tester/README.md)
     * [Running Tests](cord-tester/running.md)