add submit stress test
add submit stress test

mrocklin/distributed,broxtronix/distributed,amosonn/distributed,dask/distributed,dask/distributed,dask/distributed,mrocklin/distributed,blaze/distributed,dask/distributed,amosonn/distributed,broxtronix/distributed,blaze/distributed,broxtronix/distributed,amosonn/distributed,mrocklin/distributed