Fastener improvements of bd_warehouse

[kcleung]

@gumyr As discussed, I am breaking down @infused-kim commit #25 of bd_warehouse into small PRs

Two weeks ago, I put the first part of his PR into a separate PR #46 if the bd_warehouse repository.

Can you please have a look?

[gumyr]

Thanks. I did see that but I'm very busy and haven't had a chance. I will get to it though.