Fix various integration tests

Good question! It was experimental as a way to write entities, and to use Chef.
I think now we're using the `ChefEntity` as the "proper" way, so arguably none of this code should be needed.

@ahgittin is that true? If so, we should deprecate `DynamicToyMysqlEntityBuilder`, with a comment pointing to `ChefEntity`.

I see that `ChefSoloDriverToyMySqlEntity` is already `@Deprecated` with a comment saying to use `{Dynamic,Typed}ToyMySqlEntityChef`.

Is `DynamicToyMySqlEntityChef` still a recommended way, versus something that instantiates a `ChefEntity` (the `TypedToyMySqlEntityChef` example extends `ChefEntityImpl`)?