Test `execute` functionality of `AddAction`
Test `execute` functionality of `AddAction`

This tests whether `AddAction` works as desired when running against a
mocked ldap connection.

lukasjuhrich/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,agdsn/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,agdsn/pycroft