refactored sending the welcome mail
Merge remote-tracking branch 'upstream/develop' into feature/CLUB-632
refactored sending welcome mail to signal
removed old login fucntion
removed unused pipeline code
added test for sending welcome mail
removed unused code
moved send mail var to test settings
added welcome var to bb settings
Merge pull request #696 from onepercentclub/feature/CLUB-632

Feature/club 632