Adding select boxes to Settings changed the value method in settings_helper: https://github.com/theforeman/foreman/commit/ad603e4023c5400c51674f1fa3635565f7b3b552#diff-99f01fed5094bece4bbc97c882f4b666R4.
Discovery extends the settings_helper and adds it's own alias_method_change for value.
As a result trying to use discovery returns the error: `alias_method': undefined method `value' for module `#<Module:0x00000006f36320>' (NameError)