Added New Test Case to Validate Netconf Device Provider.

Change-Id: Ib92adcfe433580e400dd8c7ecb88a3328e47c31e
diff --git a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
index 5fb6ead..e3399f6 100644
--- a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
+++ b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
@@ -66,7 +66,7 @@
 
     private final Logger log = getLogger(NetconfDeviceProvider.class);
 
-    private Map<DeviceId, NetconfDevice> netconfDeviceMap = new ConcurrentHashMap<DeviceId, NetconfDevice>();
+    protected Map<DeviceId, NetconfDevice> netconfDeviceMap = new ConcurrentHashMap<DeviceId, NetconfDevice>();
 
     private DeviceProviderService providerService;