close the loop device after the offline update

Avoid mass storage getting busy, even after bundle update. we have to close the mounted loop device.

Signed-off-by: Gireesh Hiremath Gireesh.Hiremath@in.bosch.com

requested review from @sjoerd

requested review from @fdanis and removed review request for @sjoerd

added 5 commits

• 7435b2f5...9c8b5239 - 2 commits from branch apertis/v2022dev3
• e2f0224f - close the loop device after the offline update
• 631661cc - Add AUM upgrade error property
• add04e25 - managerd: adjust log level for failed backend selections

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changed target branch from apertis/v2022dev3 to apertis/v2022pre

added 6 commits

• add04e25...7506da64 - 3 commits from branch apertis/v2022pre
• b57dc36f - close the loop device after the offline update
• c808f904 - Add AUM upgrade error property
• 36d37486 - managerd: adjust log level for failed backend selections

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added 1 commit

• 310b0e06 - Release apertis-update-manager version 0.2020.26

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merged