This commit raises the test coverage for osusers.admin to 100% by adding
tests for UserAdmin, GroupAdmin, SshPublicKeyCreationForm and
SshPublicKeyAdmin. The commit adds a refactoring TODO to
SshPublicKeyAdmin.perform_delete_selected because the asynchronous
background task should be launched from a signal handler.
- implement new form osusers.forms.AddSshPublicKeyForm
- move message texts from osusers.admin to osusers.forms
- add new view osusers.views.AddSshPublicKey
- add new URL patter 'add_ssh_key' to osusers.urls
- add new template osusers/sshpublickey_create.html
- link from hosting package detail template to 'add_ssh_key'
- add changelog entry for new feature
- implement custom perform_delete_selected action for SshPublicKeyAdmin that
ensures that the authorized_keys files of all affected users are rebuilt
after deleting keys
- implement custom get_actions to replace the default delete_selected action
with the custom perform_delete_selected
- define get_readonly_fields to make sure that the key algorithm and data
cannot be changed
- use new file tasks to create SFTP and mail base directories for users
- use json serializer as default
- remove TaskResult classes that don't provide any significant benefit
- remove TaskResultInline and subclasses
- add custom perform_delete_selected action to UserAdmin and GroupAdmin
- properly clean asynchronous tasks in rabbitmq
- wrap user operations in transactions
