Fixed the tests

...c/main/java/at/tuwien/converters/AccessTypeConverter.java

...java/at/tuwien/converters/BannerMessageTypeConverter.java

...s/IdentifierAffiliationIdentifierSchemeTypeConverter.java

...tuwien/converters/IdentifierDescriptionTypeConverter.java

...a/at/tuwien/converters/IdentifierFunderTypeConverter.java

.../tuwien/converters/IdentifierIdentifierTypeConverter.java

...nverters/IdentifierNameIdentifierSchemeTypeConverter.java

...ava/at/tuwien/converters/IdentifierNameTypeConverter.java

.../at/tuwien/converters/IdentifierRelatedTypeConverter.java

.../tuwien/converters/IdentifierVisibilityTypeConverter.java

...main/java/at/tuwien/converters/LanguageTypeConverter.java

...n/java/at/tuwien/converters/TableColumnTypeConverter.java

...in/java/at/tuwien/entities/maintenance/BannerMessage.java

...ava/at/tuwien/entities/maintenance/BannerMessageType.java