vault API: Rename bundle types and use SWHIDs to identify objects

This is to match changes in the vault interface, see D6112 for the rationale.

All existing queries still work, through "fallback" views.  There are
some minor changes in returned fields (removed obj_type, and replace
obj_id with swhid), but I don't think anyone used them (since that info
is already available to them before they send the request).