Fix for SDN-IP installing wrong point-to-point intents.

Fixes ONOS-2514.

Ported from onos-1.2 branch.

Change-Id: I0d3d6012daa8dd2a45707a58cf6e745314f6dc24
(cherry picked from commit 0c763e9b064eac86d866b8fdfea25baec104324e)
diff --git a/apps/routing/src/main/java/org/onosproject/routing/config/impl/RoutingConfigurationImpl.java b/apps/routing/src/main/java/org/onosproject/routing/config/impl/RoutingConfigurationImpl.java
index 2667594..e45548f 100644
--- a/apps/routing/src/main/java/org/onosproject/routing/config/impl/RoutingConfigurationImpl.java
+++ b/apps/routing/src/main/java/org/onosproject/routing/config/impl/RoutingConfigurationImpl.java
@@ -187,6 +187,11 @@
     }
 
     @Override
+    public Interface getInterface(IpAddress ip) {
+        return hostAdaptor.getInterface(ip);
+    }
+
+    @Override
     public Interface getMatchingInterface(IpAddress ipAddress) {
         return hostAdaptor.getMatchingInterface(ipAddress);
     }