python/aqmp: take QMPBadPortError and parse_address from qemu.qmp

python/aqmp: take QMPBadPortError and parse_address from qemu.qmp

Shift these definitions over from the qmp package to the async qmp
package.

(Licensing: this is a lateral move, from GPLv2 (only) to GPLv2 (only))

Signed-off-by: John Snow <[email protected]>
Reviewed-by: Vladimir Sementsov-Ogievskiy <[email protected]>
Reviewed-by: Beraldo Leal <[email protected]>
Message-id: 20220330172812.3427355[email protected]
Signed-off-by: John Snow <[email protected]>