Added xtend as private package.
Added xtend as private package.

Change-Id: Ida3cb56116e7a525d776d576eaea486de5dfb3b3
Signed-off-by: Tony Tkacik <d0658a876d3f3373fb5ecec624b553a76d54e737@cisco.com>

violinlakshmi/opendaylight,my76128/controller,mandeepdhami/controller,tx1103mark/controller,aryantaheri/monitoring-controller,opendaylight/controller,inocybe/odl-controller,aryantaheri/monitoring-controller,Sushma7785/OpenDayLight-Load-Balancer,522986491/controller,tx1103mark/controller,Sushma7785/OpenDayLight-Load-Balancer,aryantaheri/controller,my76128/controller,tx1103mark/controller,Johnson-Chou/test,tx1103mark/controller,mandeepdhami/controller,inocybe/odl-controller,aryantaheri/controller,aryantaheri/controller,522986491/controller,my76128/controller,violinlakshmi/opendaylight,mandeepdhami/controller,violinlakshmi/opendaylight,aryantaheri/monitoring-controller,Johnson-Chou/test,my76128/controller,mandeepdhami/controller,aryantaheri/monitoring-controller