Update collectionsoa.py to allow user defined MPI partitioning #532

	name: linting
	on:
	pull_request:
	push:
	jobs:
	linting:
	name: Linting with flake8
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@master
	- name: Python setup
	run: \|
	pip install wheel
	pip install flake8
	- name: flake8
	run: \|
	python -m flake8 parcels
	python -m flake8 tests

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