Check_MK Werk 2690: ps: Fixed processing of old inventory_processes rules in discovery function

ID: 2690 Title: ps: Fixed processing of old inventory_processes rules in discovery function Component: Checks & Agents Level: 1 Class: Bug Fix Version: 1.2.7i4 Fixed exception "TypeError: can only concatenate tuple (not "list") to tuple" during service discovery when having legacy inventory_processes rules defined.