fix(cloudformation-stack): fix nil pointer dereference when stack does not have a RoleARN defined#8

gsoria merged 1 commit intooreilly-mainoreillymedia/aws-nuke-v2:oreilly-mainfrom

CL-1152-cloudformation-stack-fixoreillymedia/aws-nuke-v2:CL-1152-cloudformation-stack-fixCopy head branch name to clipboard