Return True if Validator.check_schema does not raise exception.

Hi.

Currently, Validator.check_schema doesn't explicitly return True.
It would be easy to test the schema if returns True.

before

@classmethod
def check_schema(cls, schema):
    for error in cls(cls.META_SCHEMA).iter_errors(schema):
        raise exceptions.SchemaError.create_from(error)

↓

after

@classmethod
def check_schema(cls, schema):
    for error in cls(cls.META_SCHEMA).iter_errors(schema):
        raise exceptions.SchemaError.create_from(error)
    return True

Thanks.

[Julian]

Hi. Thanks.

This is intentional, and works the same way Validator.iter_errors does. The
intended usage isn't if validator.check_schema(whatever): do_stuff, it's just
validator.check_schema(whatever); do_stuff. There isn't much benefit in
returning the boolean.