Fix NVME disk counter + "Best_Wins" logic fix

[adn77]

We noticed that disk performance counters did not get into InfluxDB when using NVMe disks.
This PR fixes this issue.

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[adn77]

CLA has now been signed.

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[adn77]

Sorry for pushing this in a single PR, there was a logical error in the evaluation of best_wins (absolute or percentage).
The best_wins setting was only taken into account if BOTH values were already below a not-normal state.

This should be an or condition.