storage: remove reservationTimeout from test
storage: remove reservationTimeout from test

Also use math.MaxInt32 instead of time.Hour to remove ambiguity.

Note that time.Duration is an alias of int64, but there are other
intervals in the system on which unchecked arithmetic is performed, so
MaxInt32 is safer than MaxInt64, and provides a similar benefit.

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