Allow manifest vars in docker image name

bootstrapvz/providers/docker/README.rst

@@ -20,6 +20,7 @@ Name
 -  ``name``: The image name is the repository and tag to where an
    image should be imported.
    ``required``
+   ``manifest vars``
 
 
 Provider

bootstrapvz/providers/docker/tasks/image.py

@@ -22,7 +22,7 @@ class CreateImage(Task):
 		tar_cmd = ['tar', '--create', '--numeric-owner',
 		           '--directory', info.volume.path, '.']
 		docker_cmd = ['docker', 'import', '--change', info._docker['dockerfile'], '-',
-		              info.manifest.name]
+		              info.manifest.name.format(**info.manifest_vars)]
 		cmd = ' '.join(map(quote, tar_cmd)) + ' | ' + ' '.join(map(quote, docker_cmd))
 		[info._docker['container_id']] = log_check_call([cmd], shell=True)
 

manifests/examples/docker/minimized-jessie.yml

@@ -1,5 +1,5 @@
 ---
-name: debian-{system.release}-{system.architecture}-{%y}{%m}{%d}
+name: debian-{system.release}-{system.architecture}-{%y}{%m}{%d}:latest
 provider:
   name: docker
   labels: