QA output created by 240

=== Unplug a SCSI disk and then plug it again ===

Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}

=== Attach two SCSI disks using the same block device and the same iothread ===

Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}

=== Attach two SCSI disks using the same block device but different iothreads ===

Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"error": {"class": "GenericError", "desc": "Cannot change iothread of active block backend"}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}

=== Attach a SCSI disks using the same block device as a NBD server ===

Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
{"return": {}}
*** done