Changes to Retrieve details about a bulk registration task

api tag Bulk Registrations added

api tag Bulkregistrations removed

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 200

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 400

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 404