The _get_connection_info() method attempts to gather debug information
from the connection, and will reach into the amqp channel to get the
local (client's) TCP port number via the 'sock' property.
If _get_connection_info() is called from autoretry's on_error handler
the 'sock' property notices that the transport is not set and attempts
to re-connect. amqp has deprecated this reconnect behavior, and in
any case the client's socket is irrelevant since the connection may
not be valid at this point.
Closes-Bug: #1745166
Change-Id: I3c42f8463605927f6f94d6c3a7f05e584476abc1
(cherry picked from commit 361669764f)