fixing OpticalIntentUtility for support of intents from client port to client port

Change-Id: I7505abf249e8ece5643c7f7ddac07d6e7107b277
diff --git a/apps/optical-rest/src/main/java/org/onosproject/net/optical/rest/OpticalIntentsWebResource.java b/apps/optical-rest/src/main/java/org/onosproject/net/optical/rest/OpticalIntentsWebResource.java
index 2cb1143..4643d7b 100644
--- a/apps/optical-rest/src/main/java/org/onosproject/net/optical/rest/OpticalIntentsWebResource.java
+++ b/apps/optical-rest/src/main/java/org/onosproject/net/optical/rest/OpticalIntentsWebResource.java
@@ -306,6 +306,8 @@
 
                     Link link = linkService.getLink(srcConnectPoint, dstConnectPoint);
                     if (link == null) {
+                        log.warn("Not existing link in the suggested path src {} dst {}",
+                                 srcConnectPoint, dstConnectPoint);
                         throw new IllegalArgumentException("Not existing link in the suggested path");
                     }