release-19.3:Backport!2637

Merged Andrey Vertiprahov requested to merge cherry-pick-bff49b9f into release-19.3

Fix interface_flap param on ReportMetric.

See merge request !2637 (merged)

(cherry picked from commit bff49b9f)

a331f26a Fix interface_flap param on ReportMetric.

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