BB_GetTransferList() should not be tied to job ID

[tonyhutter]

Summary:
BB_GetTransferList() currently returns all transfers for a user for current job ID. I would like to request that it simply return all transfers for the current user (ignoring the current job ID).

Is your feature request related to a problem? Please describe.
With this change, if a user initiates a transfer and their job dies, they can simply startup a new job, query BB_GetTransferList() for a list of their old transfers, and cancel them. They can not currently do this.

Describe the solution you'd like
BB_GetTransferList() returns all the user's transfers, not just the ones for the current job ID.

Describe alternatives you've considered
The only alternative is for the user to diligently record all their transfer handles in case they need to cancel them later. This puts an extra burden on the user, and is unnecessary, since the BB API already has a list of all the user's transfers.

Additional context

Issue Source:
LLNL/scr#163