Merge branch 'hotfix/fix_post_locking' into develop

* hotfix/fix_post_locking:
  fix tests
  add pry
add su
remove mailer
remove email from required
Merge branch 'feature/add_su' into develop

* feature/add_su:
  remove email from required
  remove mailer
  add su
Merge branch 'release/v2.7.0'

* release/v2.7.0:
  remove email from required
  remove mailer
  add su