Hackebrot convert test cookiecutter local with input

Convert `test_main.TestCookiecutterLocalWithInput` using `monkeypatch` of `py.test`.

According to the name of the original name and the doc string of `test_cookiecutter_input_extra_context` the `no_input` argument needs to be `False`, so I changed the former version.

Please let me know if this is correct.