Eliminating use of Apache Karaf CLI client and of ONOS_USE_SSH env. variable.

All CLI access is now through the raw SSH client.
To enable passwordless access, the 'onos-user-key' tool should be used to add user keys.
Added 'onos-user-password' tool in the similar vein and usage as the 'onos-user-key' tool.

Change-Id: Ic5482fc8012369edc818691402ba45d13f130452
diff --git a/tools/test/bin/onos-secure-ssh b/tools/test/bin/onos-secure-ssh
index d869c67..24a5a48 100755
--- a/tools/test/bin/onos-secure-ssh
+++ b/tools/test/bin/onos-secure-ssh
@@ -28,7 +28,7 @@
     ssh $ONOS_USER@$node "
         [ ! -f ~/.ssh/id_rsa.pub ] && ssh-keygen -t rsa -f ~/.ssh/id_rsa -P '' -q
         $ONOS_INSTALL_DIR/bin/onos-user-key \$(id -un) \$(cut -d\\  -f2 ~/.ssh/id_rsa.pub)
-        $ONOS_INSTALL_DIR/bin/onos-secure-ssh -u $user -p $password
+        $ONOS_INSTALL_DIR/bin/onos-user-password $user $password
 
         # Implicitly accept the new server key in dev/test environments
         while ! ssh -p 8101 -o StrictHostKeyChecking=no localhost list 2>/dev/null; do