Implement dependencies between the dates

[hibadjebabria169]

When a new submission is submitted, the dates will be dependent from version n-1 to version n, there are rules to be resepcted, these rules are explained in the curation document for the following dates: Creation date, Modification date, Submission date, Validity date, Curation date

[syphax-bouazzouni]

@hibadjebabria169 put in your description the work to be done, not just the "see the curation document" text without any link.

[jonquet]

Issue superseded by https://github.com/agroportal/project-management/issues/393