Fixed test_hyperlinked_related_lookup_url_encoded_exists.
Fixed test_hyperlinked_related_lookup_url_encoded_exists.

Space character ' ' is prohibited in IRIs, therefore we shouldn't
rely on encoding '%20' to ' ' in the HyperlinkedRelatedField tests.

dmwyatt/django-rest-framework,tomchristie/django-rest-framework,kgeorgy/django-rest-framework,atombrella/django-rest-framework,tomchristie/django-rest-framework,dmwyatt/django-rest-framework,kgeorgy/django-rest-framework,kgeorgy/django-rest-framework,jpadilla/django-rest-framework,tomchristie/django-rest-framework,davesque/django-rest-framework,davesque/django-rest-framework,ossanna16/django-rest-framework,atombrella/django-rest-framework,davesque/django-rest-framework,ossanna16/django-rest-framework,atombrella/django-rest-framework,jpadilla/django-rest-framework,dmwyatt/django-rest-framework,ossanna16/django-rest-framework,jpadilla/django-rest-framework