src: Renaming class to spell out them (Adl, Nhl, Npl, Npt, Npte)

Refs: #1534

Change-Id: If4a205e8ad2419505cc796027a5c863471ef5439
diff --git a/src/route/routing-table.cpp b/src/route/routing-table.cpp
index 2bc827c..bb7d3fa 100644
--- a/src/route/routing-table.cpp
+++ b/src/route/routing-table.cpp
@@ -144,12 +144,12 @@
   if (rteChk == 0)
   {
     RoutingTableEntry rte(destRouter);
-    rte.getNhl().addNextHop(nh);
+    rte.getNexthopList().addNextHop(nh);
     m_rTable.push_back(rte);
   }
   else
   {
-    rteChk->getNhl().addNextHop(nh);
+    rteChk->getNexthopList().addNextHop(nh);
   }
 }
 
@@ -188,12 +188,12 @@
   if (it == m_dryTable.end())
   {
     RoutingTableEntry rte(destRouter);
-    rte.getNhl().addNextHop(nh);
+    rte.getNexthopList().addNextHop(nh);
     m_dryTable.push_back(rte);
   }
   else
   {
-    (*it).getNhl().addNextHop(nh);
+    (*it).getNexthopList().addNextHop(nh);
   }
 }