release connection when no data found, update tests, correct file permissions

CMakeLists.txt

CMakeModules/prepare_version_tag.cmake

common/cpp/src/system_io/system_io_linux.cpp

deploy/nomad_jobs/asapo-brokers.nmd.in

deploy/nomad_jobs/asapo-receivers.nmd.in

deploy/nomad_jobs/asapo-services.nmd.in

examples/worker/getnext_broker/getnext_broker.cpp

tests/CMakeLists.txt

...manual/tests_via_nomad/asapo-test_dummy_producer.nomad.in

...anual/tests_via_nomad/asapo-test_filegen_filemon.nomad.in

...s/manual/tests_via_nomad/asapo-test_filegen_only.nomad.in

...ts_via_nomad/asapo-test_filemon_producer_tolocal.nomad.in

...via_nomad/asapo-test_filemon_producer_toreceiver.nomad.in

tests/manual/tests_via_nomad/broker_secret.key

worker/api/cpp/src/tcp_client.cpp

worker/api/cpp/unittests/test_tcp_client.cpp