[ONOS-4595] Harmonize the sb of the Intent Framework

Changes:
- Moves PointToPointIntent to LinkCollectionIntent;
- Moves PointToPointIntent to the new FilteredConnectPoint API;
- Updates unit tests;

Change-Id: Iade5090b9289c5b2d9f4ee41aa0d2d01b5e3699c
diff --git a/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/AbstractLinkCollectionTest.java b/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/AbstractLinkCollectionTest.java
index f7389e7..38aad30 100644
--- a/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/AbstractLinkCollectionTest.java
+++ b/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/AbstractLinkCollectionTest.java
@@ -98,6 +98,11 @@
             link(d2p0, d1p0)
     );
 
+    final Set<Link> p2pLinks = ImmutableSet.of(
+            link(d1p0, d2p0),
+            link(d2p1, d3p1)
+    );
+
     final TrafficTreatment treatment = emptyTreatment();
     final TrafficTreatment ethDstTreatment = macDstTreatment("C0:FF:EE:C0:FF:EE");
     final TrafficTreatment decTllTreatment = decTtlTreatment();