ResNet example no space left with default settings

[emattia]

In the ResNet example, the default ImageNet downloader job spec was under-resourced.

From kube logs for the job's pod:

Failed to create pod sandbox: rpc error: code = Unknown desc = failed to setup network for sandbox 
"269ccb6246354dd1910e6663193fca536256b674627105596ebe56aab76daad1": failed to set network "cni-loopback" cached 
result: write /var/lib/cni/results/cni-loopback-269ccb6246354dd1910e6663193fca536256b674627105596ebe56aab76daad1-lo: 
no space left on device

Bumping memory up to 8Gi did the trick for me.