Fix broken unit test

Author: atextor

core/sds-aspect-meta-model-java/src/test/java/io/openmanufacturing/sds/metamodel/loader/ConstraintInstantiatorTest.java

@@ -49,7 +49,7 @@ public void testLanguageConstraintInstantiationExpectSuccess( final KnownVersion
             "This is a test language constraint.",
             "http://example.com/omp" );
 
-      assertThat( languageConstraint.getLanguageCode() ).isEqualTo( Locale.GERMANY );
+      assertThat( languageConstraint.getLanguageCode() ).isEqualTo( Locale.forLanguageTag( "de" ) );
    }
 
    @ParameterizedTest

core/sds-test-aspect-models/src/main/resources/valid/bamm_1_0_0/io.openmanufacturing.test/1.0.0/AspectWithLanguageConstraint.ttl

@@ -39,6 +39,6 @@
       bamm:preferredName "Test Language Constraint"@en ;
       bamm:description "This is a test language constraint."@en ;
       bamm:see <http://example.com/omp> ;
-      bamm-c:languageCode "de-DE" ;
+      bamm-c:languageCode "de" ;
    ] ;
    bamm-c:baseCharacteristic bamm-c:Text .