release-22.2:Backport!6969

Merged Andrey Vertiprahov requested to merge cherry-pick-3d8f8c3b into release-22.2

Improve SNMPError description.

See merge request !6969 (merged)

(cherry picked from commit 3d8f8c3b)

577a51f3 Improve SNMPError description. cdbb0cfd Fix black.

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