Implement the periodic shortest path computation and triggering of
the flow path reconciliation.

For now, the computation code and the trigger itself are commented-out.
diff --git a/src/main/java/net/floodlightcontroller/core/INetMapTopologyObjects.java b/src/main/java/net/floodlightcontroller/core/INetMapTopologyObjects.java
index 18da3dd..71b6593 100644
--- a/src/main/java/net/floodlightcontroller/core/INetMapTopologyObjects.java
+++ b/src/main/java/net/floodlightcontroller/core/INetMapTopologyObjects.java
@@ -191,6 +191,12 @@
 		@Property("dst_port")
 		public void setDstPort(Short dstPort);
 
+		@Property("data_path_summary")
+		public String getDataPathSummary();
+
+		@Property("data_path_summary")
+		public void setDataPathSummary(String dataPathSummary);
+
 		@Adjacency(label="flow", direction=Direction.IN)
 		public Iterable<IFlowEntry> getFlowEntries();