Since 7b4a3d4c instead of subscribing after add code unsubscribed which is…

Since 7b4a3d4c instead of subscribing after add code unsubscribed which is illogical. Revert back. Credit Kaz.

Tests passing : https://nexedi.erp5.net/test_result_module/20200327-660269E/view?ignore_layout:int=1

See merge request !1092
7 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

08:27:16

canceled ERP5.PerformanceTest-Master

11:26:08

failed ERP5.UnitTest-Master

04:26:18

passed SlapOS.Eggs.UnitTest-Master.Python2

00:38:33

passed SlapOS.Eggs.UnitTest-Master.Python3

00:35:37

failed ERP5.CodingStyleTest-Master

01:29:26

passed ERP5.PerformanceTest-Master

00:32:06