add local 50unattended-upgrades to fix unattended-upgrades not upgrading
leap packages (#4425)

Change-Id: I78c00c4410ff9f712206f95854d8803e43acb286
Merge branch 'feature/4425' into develop
Merge "add local 50unattended-upgrades to fix unattended-upgrades not upgrading leap packages (#4425)" into develop
Merge remote-tracking branch 'gerrit/develop' into develop