Integrate licensing

[alrocar]

So we have brand new APIs in our backend to license datasets and we need to integrate them into the CF workflow.

I'm adding here a high-level description of the work to do:

• Request licensing information to the backend: A Dataset in the catalog should have some method to request licensing information. It could be something like this:

dataset = Dataset.get(id)
dataset.license_info(credentials) # Request to the corresponding licensing API

Check this comment for information about license_info

• licensing:

dataset = Dataset.get(id)
dataset.license(credentials) # This will make a request to the corresponding licensing API, depending on the availability the backend will do a speed or normal licensing

@cmongut This is the task to integrate the licensing in CARTOframes. You might want to review/change the approach.

NOTE: I update this ticket with Dataset.get(id) instead of catalog.dataset(id).

[alrocar]

This issue supersedes this other one.

[Jesus89]

Superseded by #1079