[bugfix] preload urllib.quote() with Python 2
[bugfix] preload urllib.quote() with Python 2

see https://github.com/jxtech/wechatpy/issues/375

Bug: T243710
Change-Id: I4ca356f7af915510d1820ad603a1d77be1ab5bd5

wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core