Werk #5821: Fixed exception during configuration changes

TitleFixed exception during configuration changes
Date2018-06-14 17:36:38
Check_MK EditionCheck_MK Raw Edition (CRE)
Check_MK Version1.6.0i1,1.5.0b7
LevelTrivial Change
ClassBug Fix
CompatibilityCompatible - no manual interaction needed

This exception could happens on various instances. For example when saving global settings or during the activate changes phase.

The exception text showed super(type, obj): obj must be an instance or subtype of type.