Improve the argument description in RouteRemoveCommand

such that it is consistent with RouteAddCommand

Change-Id: Iecabcb5391f68b2a293b6a36dc1cbe8d9e1030c7
diff --git a/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java b/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
index 4992d77..a78a1b7 100644
--- a/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
@@ -37,7 +37,7 @@
             required = true)
     String prefixString = null;
 
-    @Argument(index = 1, name = "prefix", description = "Next hop IP address",
+    @Argument(index = 1, name = "nextHop", description = "IP address of the next hop",
             required = true)
     String nextHopString = null;