Merge pull request #122 in ASAPO/asapo from feature_ASAPO-117-improve-datasets to develop

* commit 'f445e5fd':
  fix
  change interpretation of subset indexes
  fix test
  remove group_id argument
  consumer uses correct API
  get last,ir, remove from routes
  fix test
  do not move pointer after get_last
  fix win test
  add tests
  fix memora bug in producer
  improve go code coverage
  fix retry on partial data in dataset
  incomplete datasets in broker
  update python test
  more refactoring
  refactor broker
  incomplete datasets for consumer