OZG-7131 fix tests

vorgang-manager-server/src/test/java/de/ozgcloud/vorgang/collaboration/CollaborationITCase.java

@@ -110,7 +110,7 @@ import net.devh.boot.grpc.client.inject.GrpcClient;
 })
 @DataITCase
 @WithMockCustomUser
-@DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_CLASS)
+@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
 class CollaborationITCase {
 
 	private static final String FIELD_COLLABORATION_VORGANG_ID = "collaborationVorgangId";