CMFActivity: Disable mail sending by default

  The administrator can enable it back clicking in a button,
  this can prevent massive email sending from unattended sites (development for example)
  related to test failures or average development
7 jobs for for_testrunner_3 in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

00:45:00

failed ERP5.CodingStyleTest-TestRunner3

01:07:30

failed ERP5.UnitTest-Master

02:05:54

failed ERP5.UnitTest-TestRunner3

01:58:06

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:43

passed SlapOS.Eggs.UnitTest-Master.Python3

00:15:27

passed Wendelin.UnitTest-Master

00:35:34