Added init with QKDAppClient

from common.tools.grpc.Tools import grpc_message_to_json

from context.client.ContextClient import ContextClient

from device.client.DeviceClient import DeviceClient

from app.client.AppClient import AppClient

from app.client.QKDAppClient import QKDAppClient

def get_working_context() -> str:

    return session['context_uuid'] if 'context_uuid' in session else '---'

        device_client.connect()

        device_client.close()

        # DEPENDENCY QKD

        app_client = AppClient()

        app_client.connect()

        app_client.close()

        qkd_app_client = QKDAppClient()

        qkd_app_client.connect()

        qkd_app_client.close()

    except Exception as e:

        raise HealthError("Can't connect with the service: {:s}".format(str(e))) from e