Added Net::HTTP-level verify_mode setting and appropriate tests.
Added Net::HTTP-level verify_mode setting and appropriate tests.

sideci-sample/sideci-sample-koala,arsduo/koala,lucaskds/koala,samnang/koala,hendricius/koala,adparlor/koala,lisa-lina/koala,christer155/koala,morgoth/koala,mateusrevoredo/koala,supriyantomaftuh/koala,sancopanco/koala,chrisortman/koala,Loke155/koala