Werk #5138: CME: fixed site snapshot creation when there are users with umlauts

Component	Setup
Title	CME: fixed site snapshot creation when there are users with umlauts
Date	Aug 29, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Ultimate MT 1.4.0p10 Checkmk Ultimate MT

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