hydra-queue-runner: sleep 5s after handling an exception

instead of immediately calling readMachinesFiles again which could immediately throw another exception again.

Created by  Bas van Dijk  on January 14, 2020
ID7GJFGIUOAOA7JRSYCUKT6KCMBVQZZ6262B3SCGPFR7KYYMQ5ZQC
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