[#141465] Fix bug webservice (field optional instead of required) + remove unused methods
Merge branch 'UStests'

Conflicts:
	ginco-api/src/main/java/fr/mcc/ginco/IThesaurusService.java
	ginco-impl/src/main/java/fr/mcc/ginco/ThesaurusTypeServiceImpl.java
	ginco-impl/src/test/java/fr/mcc/ginco/tests/services/ThesaurusServiceTest.java