@Valid has been specified in Resource::getCriterionSatisfactions. A test case has been added to verify a validation constraint is generated when a resource containing a criterion satisfaction without start date is being imported with the REST service (@Valid annotation is necessary).
Bug fixed when firstName, surname or nif are null in a worker to be imported with the REST service. Now, Worker::checkConstraintUniqueFirstName checks if such fields are null.
REST service for importing resources has been exported remotely. A script and a sample file with resources is also provided. Complex validations are not implemented yet.
