iotests/210: Fix reference output

Commit 8b11700 has added a global maximum disk length for the block
layer, so the error message when creating an overly large disk has
changed.

Fixes: 8b11700
       ("block: introduce BDRV_MAX_LENGTH")
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20201214175158.299919-1-mreitz@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/210.out

@@ -182,7 +182,7 @@ Job failed: The requested file size is too large
 === Resize image with invalid sizes ===
 
 {"execute": "block_resize", "arguments": {"node-name": "node1", "size": 9223372036854775296}}
-{"error": {"class": "GenericError", "desc": "The requested file size is too large"}}
+{"error": {"class": "GenericError", "desc": "Required too big image size, it must be not greater than 9223372035781033984"}}
 {"execute": "block_resize", "arguments": {"node-name": "node1", "size": 9223372036854775808}}
 {"error": {"class": "GenericError", "desc": "Invalid parameter type for 'size', expected: integer"}}
 {"execute": "block_resize", "arguments": {"node-name": "node1", "size": 18446744073709551104}}