KpiDescriptor with attributes inserted into the Kpi Table. Working

scripts/run_tests_locally-kpi-DB.sh

src/kpi_manager/service/KpiManagerServiceServicerImpl.py

src/kpi_manager/service/KpiValueComposer.py

src/kpi_manager/service/database/KpiDBtests.py

src/kpi_manager/service/database/KpiEngine.py

src/kpi_manager/service/database/KpiModel.py

src/kpi_manager/service/database/Kpi_DB.py

src/kpi_manager/service/database/__init__.py

src/kpi_manager/service/database/__main__.py

src/kpi_manager/tests/test_messages.py

src/kpi_manager/tests/test_unitary.py