Added graceful shutdown for upstart service.
Reworked slightly the mastership & device managers and stores to make it work (sort-of) in the distributed env.
diff --git a/core/api/src/test/java/org/onlab/onos/cluster/MastershipServiceAdapter.java b/core/api/src/test/java/org/onlab/onos/cluster/MastershipServiceAdapter.java
new file mode 100644
index 0000000..4b3b7dc
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/cluster/MastershipServiceAdapter.java
@@ -0,0 +1,43 @@
+package org.onlab.onos.cluster;
+
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.MastershipRole;
+
+import java.util.Set;
+
+/**
+ * Test adapter for mastership service.
+ */
+public class MastershipServiceAdapter implements MastershipService {
+ @Override
+ public MastershipRole getLocalRole(DeviceId deviceId) {
+ return null;
+ }
+
+ @Override
+ public MastershipRole requestRoleFor(DeviceId deviceId) {
+ return null;
+ }
+
+ @Override
+ public void relinquishMastership(DeviceId deviceId) {
+ }
+
+ @Override
+ public NodeId getMasterFor(DeviceId deviceId) {
+ return null;
+ }
+
+ @Override
+ public Set<DeviceId> getDevicesOf(NodeId nodeId) {
+ return null;
+ }
+
+ @Override
+ public void addListener(MastershipListener listener) {
+ }
+
+ @Override
+ public void removeListener(MastershipListener listener) {
+ }
+}