
Currently, if you override docker_yum_url, the repo must contain a GPG key at {{ docker_yum_url }}/gpg, despite the fact that the GPG key URL can be overridden separately via docker_yum_gpgkey. This change uses docker_yum_gpgkey consistently, avoiding the need to keep the key in the repo. Closes-Bug: #1934913 Change-Id: If8e6a02ce0760123f7b076c711727ef575965192