1292: Refactor es mapping generation

Task-Url: https://pm.winseda.de/issues/1292

messages_de.properties

@@ -453,6 +453,8 @@
 ~eu.dariah.de.minfba.search.view.dataset.label.additional_data                                  = Zus\u00E4tzlich geladene Daten, Dokumente und Medien nach Spezifikation in der DME.
 ~eu.dariah.de.minfba.search.view.dataset.label.document_count                                   = Dokumente, die \u00FCber den konfigurierten Endpunkt verf\u00FCgbar sind.
 ~eu.dariah.de.minfba.search.view.item.additional_data                                           = Weiterf\u00FChrende Daten
+~eu.dariah.de.minfba.search.view.item.admin_data                                                = Informationen f\u00FCr Administratoren
+~eu.dariah.de.minfba.search.view.item.admin_metadata                                            = Administrative Metadaten
 ~eu.dariah.de.minfba.search.view.item.integrated_dataset                                        = Integrierter Datensatz
 ~eu.dariah.de.minfba.search.view.item.links                                                     = Links zur Ressource
 ~eu.dariah.de.minfba.search.view.item.original_dataset                                          = Datensatz im Original

messages_en.properties

@@ -333,6 +333,8 @@
 ~eu.dariah.de.minfba.search.view.dataset.label.additional_data                                  = Additionally loaded data, documents and media as specified by means of the DME.
 ~eu.dariah.de.minfba.search.view.dataset.label.document_count                                   = Documents that are available through the configured endpoint.
 ~eu.dariah.de.minfba.search.view.item.additional_data                                           = Additional Data
+~eu.dariah.de.minfba.search.view.item.admin_data                                                = Administrator information
+~eu.dariah.de.minfba.search.view.item.admin_metadata                                            = Administrative Metadata
 ~eu.dariah.de.minfba.search.view.item.integrated_dataset                                        = Integrated Dataset
 ~eu.dariah.de.minfba.search.view.item.links                                                     = Links for the resource
 ~eu.dariah.de.minfba.search.view.item.original_dataset                                          = Original dataset