Updated copyright headers

src/qkd_app/__init__.py

src/qkd_app/__main__.py

src/qkd_app/client/QKDAppClient.py

src/qkd_app/client/__init__.py

src/qkd_app/service/QKDAppService.py

src/qkd_app/service/QKDAppServiceServicerImpl.py

src/qkd_app/service/database/__init__.py

src/qkd_app/service/database/models/__init__.py

src/qkd_app/service/database/models/enums/QKDAppStatus.py

src/qkd_app/service/database/models/enums/QKDAppTypes.py

src/qkd_app/service/database/models/enums/__init__.py

src/qkd_app/service/rest_server/RestServer.py

src/qkd_app/service/rest_server/__init__.py

src/qkd_app/service/rest_server/qkd_app/Resources.py

src/qkd_app/service/rest_server/qkd_app/__init__.py