Remove test.orain.org
Remove test.orain.org

Their server has been compromised, I don't expect them to be back
up shortly, so remove them from .travis.yml.

Bug: T112869
Change-Id: I9617a10bc4deeb58f6a8e7e9e2c0b0a7ce64cf08

jayvdb/pywikibot-core,hasteur/g13bot_tools_new,npdoty/pywikibot,happy5214/pywikibot-core,jayvdb/pywikibot-core,magul/pywikibot-core,icyflame/batman,PersianWikipedia/pywikibot-core,npdoty/pywikibot,darthbhyrava/pywikibot-local,smalyshev/pywikibot-core,Darkdadaah/pywikibot-core,h4ck3rm1k3/pywikibot-core,wikimedia/pywikibot-core,magul/pywikibot-core,h4ck3rm1k3/pywikibot-core,happy5214/pywikibot-core,Darkdadaah/pywikibot-core,hasteur/g13bot_tools_new,hasteur/g13bot_tools_new,wikimedia/pywikibot-core