FIX CI Dockerfile to install accumulator-server.py Python 3 version
FIX CI Dockerfile to install accumulator-server.py Python 3 version

telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion