Cleanup loop devices on start

When AUM crashes with an encrypted update bundle unlocked this will prevent later update and the deletion of the loop device.
This commit clean-up the loop devices with an encrypted bundle backing file located in root folder.

Signed-off-by: Frédéric Danis frederic.danis@collabora.com

changed title from Wip/fdanis/7677 cleanup loop devcies on start to Cleanup loop devices on start

added 2 commits

• 41fd7521 - fix: Clean-up loop device from previous run
• d6a2a047 - Release apertis-update-manager version 0.2020.22

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approved this merge request

added 2 commits

• 47762ab6 - fix: Clean-up loop device from previous run
• f827cffc - Release apertis-update-manager version 0.2020.22

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resolved all threads

merged