logging changes
7.0.3
Use proper array key

Fixes https://github.com/owncloud/core/issues/12047
Login Name -> Username in user management
Ensure there is a connection object within \OC_DB::enableCaching()
Merge pull request #12083 from owncloud/fix-occ-upgrade

Ensure there is a connection object within \OC_DB::enableCaching()
updating 7.0.3
Merge branch 'stable7-upstream' into stable7-rotdrop