moving invite filter to separate module
updating to newer liquibase version
changing concept of immune roles which are directly associated to commands to immune roles which are immune against certain effects. these effects can be configured directly by the command (and a condition checks this effect), but they can be used in services as well, unrelated to commands
adding checks to not execute message received listeners for the wrong message types
adding metric support for 502 status
fixing duplicating help entries when two module definitions with the same key are present
