Added the first useful test script - for nis

Signed-off-by: Olaf Kirch <okir@suse.de>
rename ni_debug_wicked -> ni_debug_testbus

Signed-off-by: Olaf Kirch <okir@suse.de>
get rid of ni_debug_testbus_xml (which dates back to the days when wicked was an XML based protocol

Signed-off-by: Olaf Kirch <okir@suse.de>
Got rid of some rogue ni_trace calls

Signed-off-by: Olaf Kirch <okir@suse.de>