BibField: new @persistent_identifier "decorator"
- New "decorator" inside the config file that allows to specify when a json key is used as persistent identifier and its order of preference. All json keys that should be considered as persistent identifier are stored inside the calculated field _persistent_identifiers_keys. (closes #1500)
- New getter to provide a subset of the record containing all the persistent identifiers, based on _persisitent_identifiers_keys
Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>