Separate cluster management and mastership management to separate packages

Change-Id: If1e399648451842da6dccc644b75b81337b105f9
diff --git a/core/api/src/main/java/org/onlab/onos/mastership/MastershipTerm.java b/core/api/src/main/java/org/onlab/onos/mastership/MastershipTerm.java
new file mode 100644
index 0000000..640180d
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/mastership/MastershipTerm.java
@@ -0,0 +1,51 @@
+package org.onlab.onos.mastership;
+
+import java.util.Objects;
+
+import org.onlab.onos.cluster.NodeId;
+
+public final class MastershipTerm {
+
+    private final NodeId master;
+    private final int termNumber;
+
+    private MastershipTerm(NodeId master, int term) {
+        this.master = master;
+        this.termNumber = term;
+    }
+
+    public static MastershipTerm of(NodeId master, int term) {
+        return new MastershipTerm(master, term);
+    }
+
+    public NodeId master() {
+        return master;
+    }
+
+    public int termNumber() {
+        return termNumber;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(master, termNumber);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        }
+        if (other instanceof MastershipTerm) {
+            MastershipTerm that = (MastershipTerm) other;
+            if (!this.master.equals(that.master)) {
+                return false;
+            }
+            if (this.termNumber != that.termNumber) {
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+}