Commission Implementing Regulation (EU) 2017/709 of 19 April 2017 fixing the allocation coefficient to be applied to the quantities on which applications for import licences and applications for import rights lodged from 1 to 7 April 2017 are based and establishing the quantities to be added to the quantity fixed for the sub-period from 1 October to 31 December 2017 under the tariff quotas opened by Regulation (EC) No 616/2007 for poultrymeat