[bugfix] use message_package_name for i18n.twhas_key() method
[bugfix] use message_package_name for i18n.twhas_key() method

This patch re-enables using this method through Python Shell

Change-Id: I8e766f30dac4a13b6b215ddd7dc50a95386e730d

smalyshev/pywikibot-core,wikimedia/pywikibot-core,magul/pywikibot-core,wikimedia/pywikibot-core,VcamX/pywikibot-core,TridevGuha/pywikibot-core,happy5214/pywikibot-core,hasteur/g13bot_tools_new,valhallasw/pywikibot-core,emijrp/pywikibot-core,jayvdb/pywikibot-core,hasteur/g13bot_tools_new,Darkdadaah/pywikibot-core,npdoty/pywikibot,Darkdadaah/pywikibot-core,PersianWikipedia/pywikibot-core,trishnaguha/pywikibot-core,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,icyflame/batman,darthbhyrava/pywikibot-local,npdoty/pywikibot,h4ck3rm1k3/pywikibot-core,happy5214/pywikibot-core,jayvdb/pywikibot-core,xZise/pywikibot-core,magul/pywikibot-core