[tune] Deflake mnist_ptl_mini (#16555)
[tune] Deflake mnist_ptl_mini (#16555)


pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1