Merge pull request #4151 from owncloud/doctrine-object

lib/db.php

lib/db/adapter.php

lib/db/adapteroci8.php

lib/db/adapterpgsql.php

lib/db/adaptersqlite.php

lib/db/adaptersqlsrv.php

lib/db/connection.php

lib/db/mdb2schemamanager.php

lib/db/statementwrapper.php

tests/lib/db.php