Added support for OM2 labels

dbrepo-metadata-db/setup-schema.sql

...pi/src/main/java/at/tuwien/api/semantics/OntologyDto.java

.../main/java/at/tuwien/api/semantics/OntologyModifyDto.java

...n/entities/database/table/columns/TableColumnConcept.java

...wien/entities/database/table/columns/TableColumnUnit.java

.../src/main/java/at/tuwien/entities/semantics/Ontology.java

dbrepo-metadata-service/pom.xml

...tories/src/main/java/at/tuwien/mapper/OntologyMapper.java

...ta-service/rest-service/src/main/resources/rdf/om-2.0.rdf

...c/main/java/at/tuwien/service/impl/EntityServiceImpl.java

...main/java/at/tuwien/service/impl/OntologyServiceImpl.java

dbrepo-ui/components/dialogs/Semantics.vue

dbrepo-ui/components/search/AdvancedSearch.vue