Test: Adjust zip-parsing test cases

CityDoctorParent/Extensions/CityDoctorZipLoader/src/test/java/de/hft/stuttgart/citydoctor2/ziploader/ZipTest.java

@@ -27,6 +27,7 @@ public class ZipTest {
         for (CityGmlZipEntry entry : cgmlArch.getEntries()) {
             assertNotNull(entry);
             assertTrue(entry.getFileName().matches("^mock[1-5].gml$"));
+            assertFalse(entry instanceof ErroneousEntry);
             assertNotNull(entry.getModel());
         }
     }
@@ -55,6 +56,7 @@ public class ZipTest {
             for (CityGmlZipEntry entry : cgmlExport.getEntries()) {
                 assertNotNull(entry);
                 assertTrue(entry.getFileName().matches("^mock[1-5].gml$"));
+                assertFalse(entry instanceof ErroneousEntry);
                 assertNotNull(entry.getModel());
             }
         } catch (Exception e) {