Moved the Model object from the DB class to the implementation class.

src/analytics/backend/service/__main__.py

src/analytics/database/Analyzer_DB.py

.../frontend/service/AnalyticsFrontendServiceServicerImpl.py

src/analytics/frontend/service/__main__.py

src/common/tools/database/GenericDatabase.py

src/kpi_manager/database/KpiDB.py

src/kpi_manager/service/KpiManagerServiceServicerImpl.py

src/telemetry/backend/service/__main__.py

src/telemetry/database/Telemetry_DB.py

.../frontend/service/TelemetryFrontendServiceServicerImpl.py

src/telemetry/frontend/service/__main__.py