Restructured to separate stores and managers into different bundles. Reactive forwarding does not seem to work; will investigate.
diff --git a/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopology.java b/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopology.java
index efbe6af..7a56218 100644
--- a/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopology.java
+++ b/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopology.java
@@ -15,6 +15,7 @@
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.topology.ClusterId;
 import org.onlab.onos.net.topology.DefaultTopologyCluster;
+import org.onlab.onos.net.topology.DefaultTopologyVertex;
 import org.onlab.onos.net.topology.GraphDescription;
 import org.onlab.onos.net.topology.LinkWeight;
 import org.onlab.onos.net.topology.Topology;