Support flow trace CLI in openstack networking app.

Change-Id: I39d8e5febf9244e1908459d64ce089670ff38234
diff --git a/apps/openstacknetworking/BUCK b/apps/openstacknetworking/BUCK
index ec7fad0..01778ea 100644
--- a/apps/openstacknetworking/BUCK
+++ b/apps/openstacknetworking/BUCK
@@ -4,6 +4,7 @@
     '//lib:httpclient-osgi',
     '//lib:httpcore-osgi',
     '//lib:commons-codec',
+    '//lib:sshd-core',
 ]
 
 onos_app (