ExternalFPGARetinaDevice vs Spalloc bug

[Christian-B]

https://github.com/SpiNNakerManchester/sPyNNaker8/blob/master/p8_fga_tests/test_spinnaker_link_connectors/test_spinnaker_link_1pop.py

Fixed issue that p.Population should be given None instead of 2000
(part of Jenkin prs so fix by hand here)

related to: #189

USING SPALLOC!!!!

../../../PACMAN/pacman/operations/partition_algorithms/partition_and_place_partitioner.py:156: in _partition_vertex
n_atoms is not None)
../../../PACMAN/pacman/operations/partition_algorithms/partition_and_place_partitioner.py:210: in _partition_by_atoms
constraints=get_remaining_constraints(vertex))
../../../PACMAN/pacman/model/graphs/application/application_spinnaker_link_vertex.py:79: in create_machine_vertex
self._virtual_chip_x, self._virtual_chip_y)
../../../PACMAN/pacman/model/graphs/machine/machine_spinnaker_link_vertex.py:59: in set_virtual_chip_coordinates
self._virtual_chip_x, self._virtual_chip_y))

TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'

../../../PACMAN/pacman/model/constraints/placer_constraints/chip_and_core_constraint.py:33: TypeError

[Christian-B]

Could not replicate