[CORD-2876] set route source from RIP with RIP instead of FPM

Change-Id: If5c531b793f7532663adf8b1199ed8d2f1749214
diff --git a/apps/route-service/api/src/main/java/org/onosproject/routeservice/Route.java b/apps/route-service/api/src/main/java/org/onosproject/routeservice/Route.java
index f542252..4b8c2a0 100644
--- a/apps/route-service/api/src/main/java/org/onosproject/routeservice/Route.java
+++ b/apps/route-service/api/src/main/java/org/onosproject/routeservice/Route.java
@@ -51,6 +51,11 @@
         FPM,
 
         /**
+         * Route came from the RIP route source.
+         */
+        RIP,
+
+        /**
          * Route can from the static route source.
          */
         STATIC,