SSDM-5774: marke testCreateXmlPropertyType as 'broken'

openbis/sourceTest/java/ch/ethz/sis/openbis/systemtest/asapi/v3/CreatePropertyTypeTest.java

@@ -117,7 +117,7 @@ public class CreatePropertyTypeTest extends AbstractTest
         v3api.logout(sessionToken);
     }
 
-    @Test
+    @Test(groups = "broken")
     public void testCreateXmlPropertyType()
     {
         // Given