Inherits the constraints of the higher level intent

Fix ONOS-1247

Change-Id: I8a110bd3cee296f726a63fd1034b5a8f7dc7f0b3

@@ -107,6 +107,7 @@ public class MultiPointToSinglePointIntentCompiler
                 .ingressPoints(intent.ingressPoints())
                 .egressPoints(ImmutableSet.of(intent.egressPoint()))
                 .priority(intent.priority())
+                .constraints(intent.constraints())
                 .build();
 
         return Arrays.asList(result);

@@ -74,6 +74,7 @@ public class SinglePointToMultiPointIntentCompiler
                 .ingressPoints(ImmutableSet.of(intent.ingressPoint()))
                 .egressPoints(intent.egressPoints())
                 .priority(intent.priority())
+                .constraints(intent.constraints())
                 .build();
 
         return Arrays.asList(result);