adapt dbus API to prepare for answers file and change use_defaults to… #5990

Job	Run time
ruby_doc (tumbleweed)	3m 12s
ruby_linter (leap_latest)	1m 15s
integration-tests (tumbleweed)	12m 17s
frontend_build (18.x)	3m 26s
ruby_tests (tumbleweed)	3m 49s
rust_ci (tumbleweed)	9m 9s
finish	3s
	33m 11s

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