Pre-populate IP addresses for the name server upgrades
Setting up resolv.conf in BIND instance expects IP addresses of the
server to be provided. This is done wiht BindInstance.setup() method
call. However, when reusing resolver setup during upgrade BIND instance
has no IP addresses configured and fails with an assert in
Pass through the server's IP addresses during upgrade.
Signed-off-by: Alexander Bokovoy <firstname.lastname@example.org>
Reviewed-By: Christian Heimes <email@example.com>