Move restart to a job

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
move container_delete to job

handle error

remove useless errStr

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor@docker.com> (github: vieux)
Move image_export to a job

Docker-DCO-1.0-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
Move image_export to a job

Docker-DCO-1.0-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)

Adds feature: Required Parameters
Docker-DCO-1.1-Signed-off-by: Ryan ODonnell <ryan.odonnell@gmail.com> (github: odonnellryan)

Fixed formatting
Resolves: 3157 Required Parameters for Runtime Configuration Docker-DCO-1.1-Signed-off-by: Ryan ODonnell <ryan.odonnell@gmail.com> (github: odonnellryan)