[pymorse] fix #552 unsafe ayncore.loop + close_all

New safer PollThread avoids conflicts on asyncore.socket_map.
Replace simulator_service.close by asyncore.close_all after thread stops.

Thanks to @BenICE for report and testing !
[pymorse] fix pymorse_testing was out of date
[pymorse] bump version 1.2.2
[tests] Updated multiple_humans to exhibit bug #558
Merge remote-tracking branch 'upstream/master'