update decorators.py

outargs adds the validated parameters to itself. Essentially duplicating a parameter in both args and kwargs
Example:


args = (<deuce.transport.wsgi.v1_0.files.CollectionResource object at 0x1079b6828>, <falcon.request.Request object at 0x107a2d268>, <falcon.response.Response object at 0x107a0c8e8>)

outargs = {'vault_id': 'myvaultid', 'req': <falcon.request.Request object at 0x107a2d268>}

req gets duplicated.