Change the max update on shutdown

The current solution only changes the global variable into another value
but it does'nt modify the TokenBucket.
This solution modifies the capacity and fill_rate of the TokenBuckets
CREATE_BUCKET and UPDATE_BUCKET into the value defined in the settings
so that the shutdown will be faster
Merge pull request #18 from Kixeye/0.9.x-misc

Pull in Upstream Changes