example doesn't respect verbosity

[sponster-au]

If using the @hypothesis.example decorator, the settings.default.verbosity is changed to Verbosity.normal.

The following test case currently fails:

def test_example_respects_verbosity():
    @settings(verbosity=Verbosity.verbose)
    @example(x=99)
    @given(integers())
    def test(x):
        assert settings.default.verbosity == Verbosity.verbose
    test()

[Zac-HD]

This is probably a subtle problem somewhere in our internal scoping, similar to #944.