IPv6RA : Global prefix configuration tests added

Change-Id: Id25c5cbece687c92a32c8a33314c834fbacd2f74
diff --git a/apps/routeradvertisement/src/test/resources/device.json b/apps/routeradvertisement/src/test/resources/device.json
new file mode 100644
index 0000000..9c2dbcd
--- /dev/null
+++ b/apps/routeradvertisement/src/test/resources/device.json
@@ -0,0 +1,4 @@
+{
+  "prefixes": [ "2001:0558:FF10:04C9::6:100/120","2001:0558:FF10:04C9::7:100/120"  ]
+}
+