using db instead file / skel
### Changed
- Adapt exodam with the new way to get and generate yaml skeleton.
- Change generate yaml skeleton to take the skel in a database.
- Change get yaml skeleton to take the skel in a database.
### Changed
- Adapt exodam with the new way to get and generate yaml skeleton.
- Change generate yaml skeleton to take the skel in a database.
- Change get yaml skeleton to take the skel in a database.