Moved host core stuff to its own package.
diff --git a/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopologyProvider.java b/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopologyProvider.java
index f49f7d3..6b0e036 100644
--- a/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopologyProvider.java
+++ b/core/trivial/src/main/java/org/onlab/onos/net/trivial/topology/impl/DefaultTopologyProvider.java
@@ -32,7 +32,9 @@
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
- * Simple implementation of a network topology provider/computor.
+ * Default implementation of a network topology provider that feeds off
+ * device and link subsystem events to trigger assembly and computation of
+ * new topology snapshots.
  */
 @Component(immediate = true)
 public class DefaultTopologyProvider extends AbstractProvider
@@ -76,7 +78,7 @@
 
     @Activate
     public synchronized void activate() {
-        executor = newFixedThreadPool(MAX_THREADS, namedThreads("topo-compute-%d"));
+        executor = newFixedThreadPool(MAX_THREADS, namedThreads("topo-build-%d"));
         accumulator = new TopologyChangeAccumulator();
 
         providerService = providerRegistry.register(this);