fix bug after last refactor
fix bug after last refactor

This bug caused an issue where only one or two of 8 collections were
cached.
The problem was that all collections shared the same throttle/
oneTimeout.

Now collections have each their own throttle handler

dhaneshkk/db,GroundMeteor/db,divramod/db,osxi/db,Kestanous/db,urossmolnik/db