bump nvme admin command timeout to 1s
Youzhong Yang reported that some NVMe devices need longer than 100ms to complete some commands such as GET LOGPAGE.
The original 100ms timeout was chosen because it worked, it's not in the spec or anything. So we can just increase it now that we know it's too short. While at it we can make it tunable so no driver recompile is needed to increase it, should the need for that arise.