Fix: Changed call to subprocess.call() method to support older versions of Python3.

(Redmine issue: #1017)

lib/mentat/test_geoip.py

@@ -44,7 +44,7 @@ class TestMentatGeoip(unittest.TestCase):
 
     def setUp(self):
         if not os.path.isfile('/var/tmp/GeoLite2-ASN.mmdb'):
-            subprocess.run([os.path.abspath(os.path.join(os.path.dirname(__file__), '../../scripts/fetch-geoipdb.sh')), '/var/tmp'])
+            subprocess.call([os.path.abspath(os.path.join(os.path.dirname(__file__), '../../scripts/fetch-geoipdb.sh')), '/var/tmp'])
 
     def tearDown(self):
         pass