Intermediate backup of DLT connector (not functional)

src/common/tests/MockMessageBroker.py

src/common/tests/MockServicerImpl_Context.py

src/common/tests/MockServicerImpl_Service copy.py

src/dlt/connector/.gitlab-ci.yml

src/dlt/connector/Dockerfile

src/dlt/connector/client/DltClient.py

src/dlt/connector/service/DltConnector.py

src/dlt/connector/service/DltConnectorService.py

src/dlt/connector/service/DltConnectorServiceServicerImpl.py

src/dlt/connector/service/__main__.py

src/dlt/connector/tests/test_unitary.py