Pre-populate IP addresses for the name server upgrades #5153
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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
tasks.configure_dns_resolver().
Pass through the server's IP addresses during upgrade.
Fixes: https://pagure.io/freeipa/issue/8518
Signed-off-by: Alexander Bokovoy abokovoy@redhat.com