deposit: jsonalchemy refactoring fix
- Fixes deposit API to work with latest jsonalchemy updates.
- Removes conditional loading of pidstore.
- Fixes API error reporting after upgrade to Cerberus 0.5.
Co-authored-by: Esteban J. G. Gabancho <esteban.gabancho@cern.ch>
Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>