fixes for mastership handoff race conditions

Change-Id: Ifed733df1bdc3b144b6a341a9322838ea2aacd72
diff --git a/core/net/src/main/java/org/onlab/onos/cluster/impl/MastershipManager.java b/core/net/src/main/java/org/onlab/onos/cluster/impl/MastershipManager.java
index 4bcaff4a..7cf14fc 100644
--- a/core/net/src/main/java/org/onlab/onos/cluster/impl/MastershipManager.java
+++ b/core/net/src/main/java/org/onlab/onos/cluster/impl/MastershipManager.java
@@ -104,7 +104,6 @@
         MastershipEvent event = null;
         event = store.relinquishRole(
                 clusterService.getLocalNode().id(), deviceId);
-
         if (event != null) {
             post(event);
         }
@@ -229,7 +228,8 @@
                 return true;
             }
             //else {
-                //FIXME: break tie for equal-sized clusters, can we use hz's functions?
+                //FIXME: break tie for equal-sized clusters,
+                //       maybe by number of connected switches
             // }
             return false;
         }