Python2.4 compatibility fix for replica set tests

Author: A. Jesse Jiryu Davis

test/test_replica_set_connection.py

@@ -73,10 +73,10 @@ def setUp(self):
                                  for h in response.get("arbiters", [])])
 
             repl_set_status = conn.admin.command('replSetGetStatus')
-            primary_info = next(
+            primary_info = [
                 m for m in repl_set_status['members']
                 if m['stateStr'] == 'PRIMARY'
-            )
+            ][0]
 
             self.primary = _partition_node(primary_info['name'])
         else: