release-19.3:Backport!2600

Merged Andrey Vertiprahov requested to merge cherry-pick-32c790a1 into release-19.3

#1100 (closed) Fix FirmwarePolicy.get_recommended_version()

See merge request !2600 (merged)

(cherry picked from commit 32c790a1)

6a9ead41 #1100 (closed) Fix FirmwarePolicy.get_recommended_version() 6cb3050d PEP8

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