[ONOS-6376] Netconf ssh connection through Apache Mina library

Change-Id: If69fd89afe3082debc3c28a06debfed53426635c
diff --git a/providers/netconf/BUCK b/providers/netconf/BUCK
index bb0b23b..4b077ad 100644
--- a/providers/netconf/BUCK
+++ b/providers/netconf/BUCK
@@ -3,6 +3,7 @@
     '//providers/netconf/alarm:onos-providers-netconf-alarm',
     '//protocols/netconf/api:onos-protocols-netconf-api',
     '//protocols/netconf/ctl:onos-protocols-netconf-ctl',
+    '//lib:sshd-core',
 ]
 
 EXCLUDED_BUNDLES = [
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 5ddbba0..41a6ed1 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
@@ -371,7 +371,7 @@
     private void checkAndUpdateDevice(DeviceId deviceId, DeviceDescription deviceDescription) {
         Device device = deviceService.getDevice(deviceId);
         if (device == null) {
-            log.warn("Device {} has not been added to store, " +
+            log.debug("Device {} has not been added to store, " +
                              "since it's not reachable", deviceId);
         } else {
             boolean isReachable = isReachable(deviceId);