Fixed access-related errors, ref #453

...ice/src/main/java/at/tuwien/endpoints/AccessEndpoint.java

...vice/src/main/java/at/tuwien/endpoints/TableEndpoint.java

...service/src/test/java/at/tuwien/config/MariaDbConfig.java

.../test/java/at/tuwien/endpoint/AccessEndpointUnitTest.java

...c/test/java/at/tuwien/endpoint/TableEndpointUnitTest.java

...rc/test/java/at/tuwien/mvc/PrometheusEndpointMvcTest.java

.../java/at/tuwien/service/SchemaServiceIntegrationTest.java

...t/java/at/tuwien/service/TableServiceIntegrationTest.java

...st/java/at/tuwien/service/ViewServiceIntegrationTest.java

...va/at/tuwien/gateway/impl/MetadataServiceGatewayImpl.java

...e/services/src/main/java/at/tuwien/mapper/DataMapper.java

...ervices/src/main/java/at/tuwien/mapper/MariaDbMapper.java

...ervices/src/main/java/at/tuwien/service/TableService.java

.../java/at/tuwien/service/impl/TableServiceMariaDbImpl.java

dbrepo-metadata-db/1_setup-schema.sql

...main/java/at/tuwien/api/container/image/ImageDateDto.java

...src/main/java/at/tuwien/api/container/image/ImageDto.java

...tuwien/api/container/internal/PrivilegedContainerDto.java

...i/src/main/java/at/tuwien/api/database/ViewColumnDto.java

.../main/java/at/tuwien/api/database/query/ImportCsvDto.java