refactor test_scheduler
refactor test_scheduler

gameduell/dask,mrocklin/dask,jayhetee/dask,jakirkham/dask,ssanderson/dask,clarkfitzg/dask,jakirkham/dask,pombredanne/dask,ContinuumIO/dask,blaze/dask,vikhyat/dask,chrisbarber/dask,cpcloud/dask,PhE/dask,ContinuumIO/dask,dask/dask,wiso/dask,mikegraham/dask,dask/dask,jcrist/dask,jcrist/dask,blaze/dask,pombredanne/dask,simudream/dask,mraspaud/dask,clarkfitzg/dask,cowlicks/dask,ssanderson/dask,wiso/dask,simudream/dask,mrocklin/dask,PhE/dask,mraspaud/dask,jayhetee/dask,vikhyat/dask