Comment 21 for bug 1750121

I've tagged the verification of this bug as failed since restart of neutron-bgp-dragent results in a missing auth_type when attempting to recreate the peer. add_bgp_peer_to_bgp_speaker() gets a KeyError exception for 'auth_type' as can be seen in David's results in the previous comment.

I cross-checked the cherry-picked patch in 12.0.0-0ubuntu1.1 and it's the same as what upstream stable/queens has.