Convert HyperlinkedRelatedField tests to pytest style#889

n2ygk merged 2 commits intodjango-json-api:masterdjango-json-api/django-rest-framework-json-api:masterfrom

sliverc:hyperlinked-related-fields-testssliverc/django-rest-framework-json-api:hyperlinked-related-fields-testsCopy head branch name to clipboard