Adding async backups to MastershipStore

Change-Id: I36acece744b67a129a1073e08cd90690a91836ce

@@ -17,6 +17,7 @@ package org.onlab.onos.store.hz;
 
 import com.hazelcast.config.Config;
 import com.hazelcast.config.FileSystemXmlConfig;
+import com.hazelcast.config.MapConfig;
 import com.hazelcast.core.Hazelcast;
 import com.hazelcast.core.HazelcastInstance;
 
@@ -46,6 +47,13 @@ public class StoreManager implements StoreService {
     public void activate() {
         try {
             Config config = new FileSystemXmlConfig(HAZELCAST_XML_FILE);
+
+            MapConfig roles = config.getMapConfig("nodeRoles");
+            roles.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - roles.getBackupCount());
+
+            MapConfig terms = config.getMapConfig("terms");
+            terms.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - terms.getBackupCount());
+
             instance = Hazelcast.newHazelcastInstance(config);
             log.info("Started");
         } catch (FileNotFoundException e) {