Checkmk Werk 12834: Do not fail on not existing time periods in "Check period for passive Check_MK services"

ID: 12834 Title: Do not fail on not existing time periods in "Check period for passive Check_MK services" Component: Core & setup Level: 1 Class: Bug fix Version: 2.0.0p5 When time periods are configured in the ruleset "Check period for passive Check_MK services", this made the cmc fail on start. The normal behaviour of Checkmk is to create a warning message like "WARNING: The cmc_passive_check_period "ding" used by service "old;Check_MK Discovery" does not exist, falling back to 24x7." and continue. This is done for all other time period references, but did not work for this specific option. The fallback has now also been added to this options.