Werk #13402: docker_container_diskstat: fix stale service

Component Checks & agents
Title docker_container_diskstat: fix stale service
Date Nov 25, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1 2.0.0p19
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The "Disk IO" services failed to display any values and were permanently stale.

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