Check_MK Werk 3806: Sped up "Activate changes"

ID: 3806 Title: Sped up "Activate changes" Component: Core & Setup Level: 1 Class: New Feature Version: 1.4.0i1 Introduced caching for many regularly called functions. As a result, the config generation for the core should be at least 2-3 times faster. Note: The computation time highly depends on the number of used rules and hosts.