Generate the subscriber and voltTenant configuration for vsgTest.
The subscribers is now a variable for auto-generation of config.
Add a vsgTest.json config file for NUM_SUBSCRIBERS test override.

Change-Id: I55b5c68088b08ad960d31350e93909a5d66584c0
diff --git a/src/test/vsg/vsgTest.json b/src/test/vsg/vsgTest.json
new file mode 100644
index 0000000..9d04b5b
--- /dev/null
+++ b/src/test/vsg/vsgTest.json
@@ -0,0 +1,3 @@
+{
+    "NUM_SUBSCRIBERS" : 5
+}