Enable setting DummySiteinfo content dict directly
Enable setting DummySiteinfo content dict directly

- may be used by dry_site_tests e.g.
  see I968e1faad475b0c4d9ebfa6730a8d03ada6fe58a
  or examples

Change-Id: I5d8790c9b1ab11d00280ca66f9a729ec3cf44054

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