Use bytes for multiprocessing manager authkey
Use bytes for multiprocessing manager authkey

Change-Id: I668c4b6707f457142075a3d7ca62293fe0872a0c

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