openflow app: remove duplicate variable in sync_port
openflow app: remove duplicate variable in sync_port

Two aren't always better than one

Change-Id: I7effe8b87cdbf492e86138ab1d16231d9896068a
Signed-off-by: Saggi Mizrahi <90260a7db2670c69b7c0e4a224a404ebffebdad5@huawei.com>

openstack/dragonflow,FrankDuan/df_code,openstack/dragonflow,no2key/dragonflow,FrankDuan/df_code,openstack/dragonflow,neoareslinux/dragonflow,no2key/dragonflow,FrankDuan/df_code,neoareslinux/dragonflow