Reusable components

• The django apps admin.core, admin.organisation and admin.import_services can be reused to support LDAP synchronization through Keycloak. They support import of both Org. Units and Groups.
• pika.py manages a Pika connection and can with some modification be used in other python projects using Pika and RabbitMQ.
• backoff.py can be used whenever a backoff algorithm is needed.
• aescipher.py can be reused to AES encrypt and decrypt text.