acceptance: list all containers
acceptance: list all containers

It looks like the implementation of ContainerList in docker/engine-api/client
expects -1 to be passed for listing all containers. This could fix #6906.

veteranlu/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,petermattis/cockroach,vivekmenezes/cockroach,sunya123/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,sunya123/cockroach,petermattis/cockroach,vivekmenezes/cockroach,sunya123/cockroach,glycerine/cockroach,paperstreet/cockroach,veteranlu/cockroach,cockroachdb/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,glycerine/cockroach,glycerine/cockroach,glycerine/cockroach,veteranlu/cockroach,petermattis/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,maxlang/cockroach,veteranlu/cockroach,sunya123/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,petermattis/cockroach,veteranlu/cockroach,arjun4084346/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,arjun4084346/cockroach,sunya123/cockroach,arjun4084346/cockroach,petermattis/cockroach,glycerine/cockroach,glycerine/cockroach,sunya123/cockroach,maxlang/cockroach,maxlang/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,maxlang/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,maxlang/cockroach,maxlang/cockroach,arjun4084346/cockroach,veteranlu/cockroach,maxlang/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,petermattis/cockroach,maxlang/cockroach,arjun4084346/cockroach,glycerine/cockroach,arjun4084346/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,petermattis/cockroach,sunya123/cockroach,glycerine/cockroach,veteranlu/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,sunya123/cockroach