refactor: publication

...n/src/main/java/ch/unige/aou/service/MetadataService.java

...java/ch/unige/aou/service/metadata/MetadataExtractor.java

...va/ch/unige/aou/service/metadata/MetadataExtractorV2.java

...nige/aou/service/metadata/imports/ArxivImportService.java

...e/aou/service/metadata/imports/DataCiteImportService.java

...ou/service/metadata/imports/DoiCrossrefImportService.java

.../aou/service/metadata/imports/EuropePmcImportService.java

...aou/service/metadata/imports/GoogleIsbnImportService.java

...aou/service/metadata/imports/InspireHepImportService.java

...ervice/metadata/imports/MetadataAndFileImportService.java

...e/aou/service/metadata/imports/MetadataImportService.java

...rvice/metadata/imports/MetadataImportWorkFlowService.java

...unige/aou/service/metadata/imports/PmidImportService.java

...ou/service/metadata/imports/SwisscoveryImportService.java

.../aou/service/metadata/imports/UnpaywallImportService.java

...ain/java/ch/unige/aou/service/storage/Fedora3Storage.java

...c/test/java/ch/unige/aou/test/ArxivImportServiceTest.java

...est/java/ch/unige/aou/test/DataCiteImportServiceTest.java

.../java/ch/unige/aou/test/DoiCrossrefImportServiceTest.java

...t/java/ch/unige/aou/test/GoogleIsbnImportServiceTest.java