XMLBearTest: Increase XMLBearDTDUrlTest timeout

XMLBearDTDUrlTest times out regular on Travis Windows.
Increase the timeout for that test to 120s.

Related to coala#2944

Author: jayvdb

tests/xml2/XMLBearTest.py

@@ -74,6 +74,8 @@ def load_testdata(filename):
     settings={'xml_dtd': escape(dtd_file_path, '\\')},
     tempfile_kwargs={'suffix': '.xml'})
 
+
+@pytest.mark.timeout(120)
 XMLBearDTDUrlTest = verify_local_bear(
     XMLBear,
     valid_files=(valid_xml_url,),