Added a test to cover the DjangoModelPermissions #4927 issue
Added a test to cover the DjangoModelPermissions #4927 issue

`DjangoObjectPermissions` and `DjangoModelPermissions` are now properly cover for the `METHOD_NOT_ALLOWED` issue
atombrella/django-rest-framework,ossanna16/django-rest-framework,atombrella/django-rest-framework,linovia/django-rest-framework,tomchristie/django-rest-framework,jpadilla/django-rest-framework,dmwyatt/django-rest-framework,kgeorgy/django-rest-framework,edx/django-rest-framework,davesque/django-rest-framework,jpadilla/django-rest-framework,linovia/django-rest-framework,dmwyatt/django-rest-framework,kgeorgy/django-rest-framework,tomchristie/django-rest-framework,dmwyatt/django-rest-framework,ossanna16/django-rest-framework,davesque/django-rest-framework,tomchristie/django-rest-framework,edx/django-rest-framework,atombrella/django-rest-framework,ossanna16/django-rest-framework,jpadilla/django-rest-framework,edx/django-rest-framework,kgeorgy/django-rest-framework,linovia/django-rest-framework,davesque/django-rest-framework