Checkmk Werk 12475: BI availabilty: Improved computation performance

ID: 12475 Title: BI availabilty: Improved computation performance Component: BI Level: 1 Class: New feature Version: 2.1.0i1 Computing the availablity for BI aggregations requires quite a lot of computations. By removing some legacy code, the calculation is now 2-3 times faster (~5k aggregations/sec).