This speeds up parallel unit test runs from a very consistent 2:49 to
a very consistent 1:53, or a 33% reduction.
Signed-off-by: Ryan Davis <zenspider@chef.io>
When supplying a docker image that contains a registry with a port number,
such as `localhost:5000/chef/inspec:1.46.3`, the docker_image resource
was unable to locate the image in question due to incorrect parsing
of the repository and tag.
Signed-off-by: Adam Leff <adam@leff.co>
