[IMPR] Rename addCommonscat method to treat_page
[IMPR] Rename addCommonscat method to treat_page

Change-Id: I00d6fcd63d1341e5416e80c0f434ad159b5828c7

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