F merge missing list datatype

Summary

For #151 (closed). Does not fix the actual problem because this is a CloseWon't Fix (or has to be fixed in the crawler) but raises a better error message instead.

Focus

Check that the correct error message is shown.

Test Environment

Unit tests should be sufficient.

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unittests/test_issues.py

@@ -34,6 +34,6 @@ def test_issue_100():
     # Parse from (invalid) XML file
     filename = os.path.join(os.path.dirname(__file__), "data", "list_in_value.xml")
     xml_el = lxml.etree.parse(filename).getroot()
-    with raises(db.TypeError) as exc_info:
+    with raises(TypeError) as exc_info:
         db.common.models._parse_single_xml_element(xml_el)
     assert "Invalid datatype: List valued properties" in exc_info.value.msg