release-20.2:Backport!4239

Merged Andrey Vertiprahov requested to merge cherry-pick-45c30eb5-2 into release-20.2

Generic.get_capabilities add 'SNMP | OID | EnterpriseID' len check.

See merge request !4239 (merged)

(cherry picked from commit 45c30eb5)

ea9ed4f8 Generic.get_capabilities add 'SNMP | OID | EnterpriseID' len check.

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