Werk #4754: Fixed possible "Operation not permitted issue" during activation

Component	Setup
Title	Fixed possible "Operation not permitted issue" during activation
Date	May 31, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p6 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

In case a pid of a former activation process is reused by a process of another user a "OSError: [Errno 1] Operation not permitted" exception could occur.

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