Remove leftover from the centralized controller
Remove leftover from the centralized controller

Change-Id: I7cc5b23d061b98fa4bfb9d5d950703ecdff0833a

openstack/dragonflow,openstack/dragonflow,FrankDuan/df_code,FrankDuan/df_code,FrankDuan/df_code,openstack/dragonflow