Include address type in getting instance response.
* Deprecate confip option network_label_regex as we don't reply on Nova
to get addresses, network names don't make any sense.
* Add 'addresses' in instance API response, keep 'ip' as is but mark
it deprecated in API doc, python-troveclient shouldn't break.
Story: 2007562
Task: 39445
Change-Id: Ia0458b5ddae8959ce29c17e444e1a51a026283cd