qemu-iotests: Avoid unnecessary sleeps
Test cases 030, 041 and 055 used to sleep for a second after calling block-job-pause to make sure that the block job had time to actually get into paused state. We can instead poll its status and use that one second only as a timeout. The tests also slept a second for checking that the block jobs don't make progress while being paused. Half a second is more than enough for this. These changes reduce the total time for the three tests by 25 seconds on my laptop (from 155 seconds to 130). Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com>
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