[FIX] page: Resolve recursion in isFlowPage
[FIX] page: Resolve recursion in isFlowPage

With 7690ae5b2ab98007470382051786aec64eb2fb39 the method 'isFlowPage'
was deprecated by 'is_flow_page' but instead of calling the new method
it was calling itself.

Change-Id: I7519f60a791c963ac7d77a26f2e75194c7f30f23

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