Changes to telemetry service
- 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