Werk #962: Fix CSV-Export in availability table

Component	Reporting & availability
Title	Fix CSV-Export in availability table
Date	May 2, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.5i3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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