acceptance: fix allocator tests
acceptance: fix allocator tests

`nodectl`, which uploads and downloads archived stores,  was failing to
invoke `gsutil`, because recently, `~/.config/gcloud` started being
owned by root upon instance creation for some reason.

glycerine/cockroach,paperstreet/cockroach,glycerine/cockroach,petermattis/cockroach,glycerine/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,petermattis/cockroach,paperstreet/cockroach,maxlang/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,petermattis/cockroach,maxlang/cockroach,vaibhavarora/cockroach,glycerine/cockroach,veteranlu/cockroach,glycerine/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,paperstreet/cockroach,maxlang/cockroach,paperstreet/cockroach,cockroachdb/cockroach,petermattis/cockroach,petermattis/cockroach,glycerine/cockroach,cockroachdb/cockroach,paperstreet/cockroach,cockroachdb/cockroach,petermattis/cockroach,maxlang/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,veteranlu/cockroach,petermattis/cockroach,cockroachdb/cockroach,maxlang/cockroach,veteranlu/cockroach,glycerine/cockroach,veteranlu/cockroach,maxlang/cockroach,cockroachdb/cockroach,petermattis/cockroach,maxlang/cockroach,glycerine/cockroach,maxlang/cockroach