use etc/hazelcast.xml + modifications when creating HZ for testing

Change-Id: I92d554d2e8c696780c3a2fab2accdab396a3805b
diff --git a/core/store/src/main/java/org/onlab/onos/store/device/impl/DistributedDeviceStore.java b/core/store/src/main/java/org/onlab/onos/store/device/impl/DistributedDeviceStore.java
index 52e8ed0..d73dd9e 100644
--- a/core/store/src/main/java/org/onlab/onos/store/device/impl/DistributedDeviceStore.java
+++ b/core/store/src/main/java/org/onlab/onos/store/device/impl/DistributedDeviceStore.java
@@ -110,6 +110,7 @@
 
     @Deactivate
     public void deactivate() {
+
         log.info("Stopped");
     }