Check_MK Werk 5822: WATO Web-API set_ruleset: Now able to delete complete rulesets from folders

ID: 5822 Title: WATO Web-API set_ruleset: Now able to delete complete rulesets from folders Component: WATO Level: 1 Class: Bug fix Version: 1.6.0i1 Removing all rulesets of a specific type from a folder always failed with the exception <tt>'list' object has no attribute 'get'</tt>. This has been fixed.