Fix Answer's class conflict
Fix Answer's class conflict

We have two models called `Answer`: The `Answer` model and the `Poll::Answer` model.

This conflict ocurrs when trying to create a user generated poll for a proposal. from the Dashboard. In that case we are getting an exception, only in the development environment, as the class `Answer` is loaded before the class `Poll::Answer` which is the one we want to use.

With this commit we are explicitly requiring the correct model, solving the class conflict.

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