Check_MK Werk 5852: Fixed broken "Management board SNMP credentials" inheritance

ID: 5852 Title: Fixed broken "Management board SNMP credentials" inheritance Component: WATO Level: 1 Class: Bug fix Version: 1.5.0i4 SNMP credentials for management board that were set on folders were not inherited to hosts. The credentials can now also be set to "No explicit credentials" to disable the inheritance of credentials for a host. The host will then either use the SNMP credentials set in the ruleset "Management board config" or use the default SNMP community "public".