updating the oai version in the oai_connect_test.py

Author: Mazztok45

test/oai_connect_test.py

@@ -8,7 +8,7 @@
 
 class PlainXmlTest(unittest.TestCase):
     def test_similarity(self):
-        self.assertEqual("1.5.4", oai_connection.get_version())
+        self.assertEqual("1.5.8", oai_connection.get_version())
 
 
 if __name__ == '__main__':