Merge branch 'release-2.3'

APIs/dataTransferAPI.py

conf/dataManager.conf

data/target/commissioning/.gitignore

data/target/current/.gitignore

data/target/local/.gitignore

data/zmq_target/commissioning/.gitignore

data/zmq_target/current/.gitignore

data/zmq_target/local/.gitignore

docs/ReleaseNotes.txt

src/TangoCommunication/TangoClient.py

src/TangoCommunication/TangoServer.py

src/initScripts/zeromq-data-transfer@.service

src/receiver/DataReceiver.py

src/sender/DataDispatcher.py

src/sender/DataManager.py

src/sender/SignalHandler.py

src/sender/TaskProvider.py

src/sender/dataFetchers/getFromFile.py

src/sender/dataFetchers/getFromHttp.py

src/sender/dataFetchers/getFromZmq.py