builder/digitalocean: properly cleanup goroutines for status checking
builder/digitalocean: properly cleanup goroutines for status checking

suma/packer,TranscendComputing/packer,TranscendComputing/packer,Kaixiang/packer,suma/packer,TranscendComputing/packer,Kaixiang/packer,Kaixiang/packer,suma/packer,patricklucas/packer,TranscendComputing/packer,suma/packer,patricklucas/packer,patricklucas/packer,Kaixiang/packer,patricklucas/packer