- A generic DB class is added in common.tools.databse.

- Changed the column type of the start and end timestamps to Float.
- Added ConvertRowToCollector() in TelemetryModel.
- Renamed the class variable from "DBobj" to "tele_db_obj".
- Renamed the local variable from "collector_id" to "collector_uuid".
- Added PublishStopRequestOnKafka() to publish the stop collector request on Kafka.
- Improved the test files.

- updated test file to log DEBUG cmd
- change the class name of "TelemetryDBmanager" to "TelemeterDB"
- corrected the DB name
- move messages.py and test files to correcte location.

- TelemetryEngine.py is updated.
- TelemetryModel.py is refined.
- Optimized DB operation were added in TelemetryDB.py

- refine Kpi_DB.py methods.
- improve description of messages.
- imporve the text description.

- comment is added in Kpi DB file for future reference.

- refine Kpi_DB.py methods.
- improve description of messages.
- imporve the text description.

- comment is added in Kpi DB file for future reference.

- Test was failing due to a "NotFoundException."
- Replaced with None and made approriate changes in files (Kpi_DB.py and KpiManagerServiceImpl) to handle the None value.

- fixes deployment of KPI Writer and API