Log test start and end, and result
Log test start and end, and result

Add debug log messages for the start and end of each unit test.

Change-Id: I701dfa1fbdb21982664c537346986da5f57f6ccd

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