role reassignment tweaks

Change-Id: Ie6d412787330e67a13e605a34f0824cf70882f85
diff --git a/core/api/src/main/java/org/onlab/onos/cluster/MastershipService.java b/core/api/src/main/java/org/onlab/onos/cluster/MastershipService.java
index d417516..ffee162 100644
--- a/core/api/src/main/java/org/onlab/onos/cluster/MastershipService.java
+++ b/core/api/src/main/java/org/onlab/onos/cluster/MastershipService.java
@@ -33,7 +33,7 @@
     /**
      * Abandons mastership of the specified device on the local node thus
      * forcing selection of a new master. If the local node is not a master
-     * for this device, no action will be taken.
+     * for this device, no master selection will occur.
      *
      * @param deviceId the identifier of the device
      */