Using updated py common utility subintf apis and updating mock_tables

Author: preetham-singh

scripts/intfutil

@@ -384,7 +384,6 @@ def appl_db_sub_intf_status_get(appl_db, config_db, front_panel_ports_list, port
 
         full_intf_table_name = "INTF_TABLE" + ":" + sub_intf_name
 
-
         if status_type == "vlan":
             vlan_id = appl_db.get(appl_db.APPL_DB, full_intf_table_name, status_type)
             return vlan_id