Fix creating EDGE dataset without product attribute specified

[MauDagos]

Requesting a creation of a dataset to the EDGE RPApi would fail if the Dataset had no product specified:

import os
 
from ravenpackapi import Dataset, RPApi
 
if __name__ == "__main__":
    api = RPApi(api_key=os.getenv("RP_API_KEY"), product="edge")
 
    entity_relevance = "relevance"  # For RPA
    entity_relevance = "entity_relevance"  # For EDGE
 
    ds = api.create_dataset(
        Dataset(
            name="New Dataset",
            filters={entity_relevance: {"$gte": 90}},
        )
    )
 
    print("Dataset created", ds)

Would return:

Error calling the API, we tried: curl -X POST -H 'API_KEY:CMO2m4xx1bzcA5dU89CPuV' -d '{"product": "RPA", "product_version": "1.0", "name": "New Dataset", "filters": {"entity_relevance": {"$gte": 90}}}' 'https://api-edge.ravenpack.com/1.0/datasets'
Traceback (most recent call last):
  File "/home/mdagostino/workspace/python-api/pcp-13076.py", line 11, in <module>
    ds = api.create_dataset(
  File "/home/mdagostino/workspace/python-api/ravenpackapi/core.py", line 160, in create_dataset
    new_dataset.save()
  File "/home/mdagostino/workspace/python-api/ravenpackapi/exceptions.py", line 64, in decorated_func
    return func(instance, *args, **kwargs)
  File "/home/mdagostino/workspace/python-api/ravenpackapi/models/dataset.py", line 207, in save
    response = self.api.request(endpoint=endpoint, json=data, method=method)
  File "/home/mdagostino/workspace/python-api/ravenpackapi/core.py", line 123, in request
    raise get_exception(response)
ravenpackapi.exceptions.APIException: Got an error 400: body was '{"endpoint":"datasets","errors":[{"type":"ValidationError","reason":"Field 'product' must be 'edge'","parameter_name":"product","value":"RPA"}]}'

Now this workflow works as expected.

One downside is that it's now possible for a Dataset object to have a None product.

[joserc87]

LGTM!