Werk #8563: Make creation/opening of the command pipe more robust

Component	The Checkmk Micro Core
Title	Make creation/opening of the command pipe more robust
Date	Jun 2, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Enterprise (CEE), Checkmk MSP (CME)

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