Check_MK Werk 4951: Added missing host custom variables to notifications created by the EC

ID: 4951 Title: Added missing host custom variables to notifications created by the EC Component: Event Console Level: 1 Class: Bug fix Version: 1.5.0i1 When creating notifications with the Event Console custom host attributes (HOST_*) were not added to the notification context. In notifications created by the core the attributes were available. This has been consolidated now, making the EC notifications have variables like HOST_MYVAR when having a custom attribute named MYVAR.