Werk #10000: ps, docker_container_mem: Fix garbled sections if ps is not available

Component	Checks & agents
Title	ps, docker_container_mem: Fix garbled sections if ps is not available
Date	Sep 2, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0b8 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

On some docker containers the ps command is not available. This lead to garbled sections in the 1.6.0 beta versions.

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