Added link types of TUNNEL and OPTICAL.
Fixed the optical config json file.
Fixed treatment of links added by ancillary providers.
Added a trap for topology provider errors.
Added CLI to recompute topology.
diff --git a/core/net/src/main/java/org/onlab/onos/net/link/impl/LinkManager.java b/core/net/src/main/java/org/onlab/onos/net/link/impl/LinkManager.java
index 835c47e..e59eb9f 100644
--- a/core/net/src/main/java/org/onlab/onos/net/link/impl/LinkManager.java
+++ b/core/net/src/main/java/org/onlab/onos/net/link/impl/LinkManager.java
@@ -208,7 +208,7 @@
             LinkEvent event = store.createOrUpdateLink(provider().id(),
                                                        linkDescription);
             if (event != null) {
-                log.debug("Link {} detected", linkDescription);
+                log.info("Link {} detected", linkDescription);
                 post(event);
             }
         }