Related tests:
1. block_hotplug
2. block_hotplug_negative
3. block_hotplug_in_pause
4. block_resize
5. disk_extension
Signed-off-by: Nlolyu <lolyu@redhat.com>

There is error "scsi-cd is not supported by data plan" when
set driveformat to virtio_scsi for Windows guest testing.
Change cdrom format to ide to fix this issue.
Signed-off-by: Nqingwangrh <qinwang@redhat.com>

There is insufficient disk space result in guest in paused
io-error status. This test doing disk extension until it meet
real disk size and guest may back to running status.
Signed-off-by: Nqingwangrh <qinwang@redhat.com>