core: services: ardupilot_manager: Make pylint happy #2254

Job	Run time
python-tests	3m 47s
frontend-tests	2m 15s
deploy-docker-images (core, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	2m 58s
deploy-docker-images (bootstrap, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	2m 58s
deploy-raspberry-image	0s
	11m 58s

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