iotests: simple mirror test with kvm on 1G image

iotests: simple mirror test with kvm on 1G image

This test is broken without previous commit fixing dead-lock in mirror.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Acked-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit db5e8210adbafe9c6383d8364345a8c545d38e62)
*drop context deps from test groups not in 3.0
*modify expected QMP output to match encoding for 3.0
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>