FAI partition table cannot be saved anymore

Changes are ignored if we do not modify root object

(from redmine: issue id 5411, created on 2017-03-08, closed on 2017-03-09)

• Relations:
  • relates #4893
  • relates #5413 (closed)
  • copied_to #5412
• Changesets:
  • Revision 5421ecd1 by Côme Chilliet on 2017-03-08T09:30:30.000Z:

Fixes #5411 Fixed saving of most FAI objects by adding shouldSave method