Tiny fix: make use of constructor argument in ThrottledGC (#1496)
Tiny fix: make use of constructor argument in ThrottledGC (#1496)

* tiny fix: make use of constructor argument in ThrottledGC

* change warn_if_longer default to 1s

mrocklin/distributed,mrocklin/distributed,blaze/distributed,dask/distributed,mrocklin/distributed,blaze/distributed,dask/distributed,dask/distributed,dask/distributed