[FIX] Expiry feature of Siteinfo
[FIX] Expiry feature of Siteinfo

The expiry needs to be converted into a timestamp also if the int
is 0 (it thought it can the cache thing completely). Also one call
used the old "force" parameter which was discontinued.

Change-Id: Ifc3406eab34e5cc5734c0659c9113cd277a23014

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