PLD: clean up non owner test
PLD: endpoint to change the role of an org member, closes #554
PLD: typo and add descriptive error
Merge pull request #566 from onaio/554-role-change-endpoint

554 role change endpoint
PLD: endpoint to direct link, #559
PLD: doc for link endpoint
PLD: typos
PLD: reference filename without serializer
PLD: only get filename if needed
PLD: uncomment string assert