some changes required to do the tests.

src/kpi_manager/service/database/Kpi_DB.py

src/kpi_manager/tests/KPI_configs.json

src/kpi_manager/tests/test_kpi_composer.py

src/kpi_manager/tests/test_kpi_manager.py

src/telemetry/backend/service/TelemetryBackendService.py

src/telemetry/backend/tests/testTelemetryBackend.py