runtime: TestMapIterOrder flaky

[randall77]

An overnight run of all.bashes shows this test to be flaky.

    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]
    map_test.go:438: Map with n=9 elements had consistent iteration order: [0 1 2 3 4 5 6 7 8]

This will happen if all 9 elements get mapped to one bucket, which will happen with
probability 2^-9 = 1 in 512.

This bug should get fixed as part of fixing bug 6719.

[randall77]

Comment 1:

CL 47370043 should have fixed this.

Status changed to Fixed.