Fix Python2 compatibility of warden_server

warden_server/warden_server.py

@@ -894,7 +894,7 @@ class MySQL(DataBase):
             self, req, log, host, user, password, dbname, port, retry_count,
             retry_pause, event_size_limit, catmap_filename, tagmap_filename):
 
-        super().__init__(req, log, host, user, password, dbname, port, retry_count,
+        super(DataBase, self).__init__(req, log, host, user, password, dbname, port, retry_count,
             retry_pause, event_size_limit, catmap_filename, tagmap_filename)
 
         import MySQLdb as db
@@ -1146,7 +1146,7 @@ class PostgreSQL(DataBase):
             self, req, log, host, user, password, dbname, port, retry_count,
             retry_pause, event_size_limit, catmap_filename, tagmap_filename):
 
-        super().__init__(req, log, host, user, password, dbname, port, retry_count,
+        super(DataBase, self).__init__(req, log, host, user, password, dbname, port, retry_count,
             retry_pause, event_size_limit, catmap_filename, tagmap_filename)
 
         import psycopg2 as db