re-add WORKER_CUSTOM_SUBNET to settings
re-add WORKER_CUSTOM_SUBNET to settings

StanfordBioinformatics/xppf,StanfordBioinformatics/xppf,StanfordBioinformatics/xppf,StanfordBioinformatics/loom,StanfordBioinformatics/loom,StanfordBioinformatics/xppf,StanfordBioinformatics/loom,StanfordBioinformatics/loom