[Profiler] [Redis] Fix sort of profiler rows.
merged branch stephpy/redis_profiler_sort (PR #6703)

This PR was merged into the 2.1 branch.

Commits
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9257b03 [Profiler] [Redis] Fix sort of profiler rows.

Discussion
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[Profiler] [Redis] Fix sort of redis storage profiler rows.

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
License of the code: MIT

Redis profiler rows are not sorted as expected.

We have in redis:

```
- 2011-01-01 ...
- 2011-01-02 ...
- 2011-01-03 ...
```

If we limit to 2, we'll have:

```
- 2011-01-02 ...
- 2011-01-01 ...
```

Fixed this bug by reversing array.