Fixed annotation handling.

- Store as SparseAnnotations internally and convert to Annotations
  when merging multiple provider supplied annotations.

Change-Id: I82fe159b536b3e7344a33e09792f6a3473fb3500
diff --git a/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyVertexTest.java b/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyVertexTest.java
index 1284624..7210ff3 100644
--- a/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyVertexTest.java
+++ b/core/api/src/test/java/org/onlab/onos/net/topology/DefaultTopologyVertexTest.java
@@ -26,5 +26,4 @@
                 .addEqualityGroup(new DefaultTopologyVertex(D2),
                                   new DefaultTopologyVertex(D2)).testEquals();
     }
-
-}
\ No newline at end of file
+}