Separate cluster management and mastership management to separate packages

Change-Id: If1e399648451842da6dccc644b75b81337b105f9
diff --git a/core/api/src/main/java/org/onlab/onos/net/device/DeviceClockProviderService.java b/core/api/src/main/java/org/onlab/onos/net/device/DeviceClockProviderService.java
index cfd14c0..bdaf94f 100644
--- a/core/api/src/main/java/org/onlab/onos/net/device/DeviceClockProviderService.java
+++ b/core/api/src/main/java/org/onlab/onos/net/device/DeviceClockProviderService.java
@@ -1,6 +1,6 @@
 package org.onlab.onos.net.device;
 
-import org.onlab.onos.cluster.MastershipTerm;
+import org.onlab.onos.mastership.MastershipTerm;
 import org.onlab.onos.net.DeviceId;
 
 //TODO: Consider renaming to DeviceClockProviderService?