Werk #11897: Fix misc regressions with Piggyback configuration

Component	Setup
Title	Fix misc regressions with Piggyback configuration
Date	Dec 16, 2020
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

In some cases, the core helpers would not parse the Piggyback configuration for a Host correctly.

This has been fixed.

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