Re #8476 - Implemented `list_certificates` with unit tests.
Re #8476 - Finalized `create_certificate`. Update of swagger main.py
Re #8476 - Database FileAnchor utilization.
Re #8476 - Controller create certificate bugfix.
Re #8476 - Clarity update.
Re #8476 - Added as a part of the swagger-generated server stub. Imported required objects, SQLite3 thread issue hack (performance impact negligible, violates encapsulation), implemented `create_certificate`.
Re #8476 - Added as a part of the swagger-generated server stub, fixed attribute error (https://github.com/zalando/connexion/issues/739)
Re #8476 - Added swagger.yaml (created by Jan Pašek).
Re #8476 - Added as a part of the swagger-generated server stub, set base path to root.
Re #8476 - Added swagger-generated server stub.