- Renamed the method to "KafkaKpiConsumer" to avoid conflict with the "KafkaConsumer" import in KpiApiWriter.
- Removed unnecessary imports in KpiWriterToProm.
- Added `get_service_port_grpc` call and imports in the Telemetry backend service.
- Added new libraries to `requirements.in` for Telemetry.

- GenericGrpcService inheritance is added in Telemetry backend class.
- Database folder were missing in working directory in DockerFile of Telemetry Frontend.

- TelemetryBackendService name and port is added in constants
- get_kafka_address() call added in TelemetryBackendService
- kafk topics test added in telemetrybackend test file
- get_kafka_address() call added in TelemetryBackendServiceImpl
- kafk topics test added in telemetryfrontend test file
- improvements in Telemetry gitlab-ci file
   + unit_test for telemetry backend and frontend added.
   + many other small changes

- GenerateRawMetrics() add

- BackendService is restructured according to the design in report.
- ResponseListener is added in Frontend
- Improvements in test and messages files

Modification made for tests (fetch_node_exporter_metrics and stream_node_export_metrics_to_raw_topic)

Added the implementation of "Kafka_listener", "Initiate_collector_backend" and "generate_kafka_reply"

"KafkaProducerService" and "KafkaProducerServiceImpl" class name changed to "TelemetryBackendService" and "TelemetryBackendServiceImpl" respectivily

folder name changed from "telemetry_frontend" to "frontend",  and "client", "service" and "tests" move inside the "frontend"