'Incremental sleep until option appeared.'

@tenacity.retry(stop=tenacity.stop_after_delay(3))
def find_option(self, text):

    options = self.case.browser.find_by_css(self.option_selector)
    for option in options:
        if (text in option.text):
            return option
    raise Exception((u'Option    %s    not    found' % text))
