Fill parameter name from Link object instead of using "data"

[wrsulliv]

As described by #28, the "name" field of the generated Swagger JSON is currently hard-coded to "data". When using swagger-codegen, the generated models are labeled <Data*> which breaks the reusability of the generated SDKs.

The proposed solution allows a user to set a "title" property on a view (or viewset) which is then used to generate the "name" field in this format: <Title><Action>Params.

For example, the "post" action of the following viewset will be given a name of "CommentPostParams" instead of "data".

class CommentViewSet(viewsets.ModelViewSet):
    queryset = Comment.objects.all()
    serializer_class = CommentSerializer
    title = "comment"

This pull request has an associated pull request at encode/django-rest-framework#5275, both of which act to drive further discussion on #28.

Assuming views and viewsets are named <ViewName>View and <ViewSetName>ViewSet, it would also be possible to extract the view name automatically with a small code change.

Related issue: marcgibbons/django-rest-swagger#595