Tests use pysolr version_info to work on Python 3.6

Author: acdha

test_haystack/solr_tests/test_solr_backend.py

@@ -1458,7 +1458,7 @@ def test_boost(self):
         ])
 
 
-@unittest.skipIf(pysolr.__version__ < (3, 1, 1), 'content extraction requires pysolr > 3.1.0')
+@unittest.skipIf(pysolr.version_info < (3, 1, 1), 'content extraction requires pysolr > 3.1.1')
 class LiveSolrContentExtractionTestCase(TestCase):
     def setUp(self):
         super(LiveSolrContentExtractionTestCase, self).setUp()