[list-ops] Add a reverse test with an odd-length list

[resu-xuniL]

Add the new test for list-ops (exercism/problem-specifications#2685)

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This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

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[resu-xuniL]

Didn't saw it was done. Sorry. (didn't sync my fork!)