Check_MK Werk 5887: Protect against checks overriding Check_MK internal config variables

ID: 5887 Title: Protect against checks overriding Check_MK internal config variables Component: Core & setup Level: 1 Class: Bug fix Version: 1.5.0i4 When a check declares a Check_MK internal configuration variable in it's global namespace, for example "service_descriptions", it was overrding Check_MK internal configuration variables with this statement in previous Check_MK versions. Check_MK now prevents the checks from overriding already known configuration variables.