+ Base uri is allowed to end with one of ['/', '#', ':']
+ A not null constraint added for base_uri column in vocabulary table
+ Unit tests are updated to conform changes
Refs: #20428
Add some more unit tests and fix a bug in RDF export. Refs #20428.
Fix CSV import for related elements with base URIs starting differently than http. Add more unit tests. Refs #20428.
Merge branch 'baseuriending_20428'

Conflicts:
	src/main/java/eionet/meta/imp/VocabularyCSVImportHandler.java
	src/test/java/eionet/meta/service/CSVVocabularyImportServiceTest.java
+ unittest failures are fixed after merge