erp5_trade_ja: Set tax code manually in tax summary for now (so that it matches lines tax code).

6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:49:18

passed ERP5.UnitTest-Master

01:32:06

passed SlapOS.Eggs.UnitTest-Master.Python2

00:15:22

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:46

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:05

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:48