Werk #8005: Fix encoding of &, > and < in PNP metainformation

Component	The Checkmk Micro Core
Title	Fix encoding of &, > and < in PNP metainformation
Date	Jun 20, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.5i4 Checkmk Enterprise (CEE), Checkmk MSP (CME)

This fixes the bug that graphs from services that contain these characters would break with an exception.

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