Annotation xytext property does not return xyann value

[taldcroft]

The deprecation wrapper here needs to return the self.xyann value.

    @property
    @cbook.deprecated('1.4', message='Use `xyann` instead',
                      name='xytext', alternative='xyann')
    def xytext(self):
        self.xyann

[cimarronm]

Thanks...good catch

[tacaswell]

closed by #3501