requested to merge openbravo/devel/openbravo:fix/28703-remove-dbmanager into master
dbmanager.jar and it's content is long unused inside dbsourcemanager.
This MR finally removes those by:
- removing some leftover text-references still passed to dbsm tasks (but unused inside already)
- Removing dbmanager.jar sources + build system (i.e. ant database.lib) completely
- Adding auto-cleanup to remove
- src-db/build (temp build-folder used before via ant database.lib)
- src-db/database/lib/dbmanager.jar As build-system before copied the output jar manually into here (which spread to WebContent/WEB-INF/lib)