cmd/juju: map ordering test failure

[Dave Cheney]

----------------------------------------------------------------------
FAIL: run_test.go:269: RunSuite.TestAllMachines

run_test.go:293:
    c.Check(testing.Stdout(context), gc.Equals, string(jsonFormatted)+"\n")
... obtained string = "[{\"Error\":\"command timed out\",\"MachineId\":\"1\",\"Stdout\":\"\"},{\"MachineId\":\"0\",\"Stdout\":\"megatron\\n\"}]\n"
... expected string = "[{\"MachineId\":\"0\",\"Stdout\":\"megatron\\n\"},{\"Error\":\"command timed out\",\"MachineId\":\"1\",\"Stdout\":\"\"}]\n"

OOPS: 254 passed, 1 FAILED
--- FAIL: TestPackage (164.91s)
FAIL
FAIL github.com/juju/juju/cmd/juju 165.123s