Werk #8851: Fix broken "Parameters of X" for clustered services

Component Setup
Title Fix broken "Parameters of X" for clustered services
Date Aug 13, 2019
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.6.0b6 2.0.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The "Parameters of X" page always showed an exception like "'list' object has no attribute 'check_plugin_name'".

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