packet loss computation fix in segment algo

Metric Store with InfluxDB

added latency & traffic metric reporting in tc-sidecar + flush scenario-specific influx DB on activation

Adding influxdb helm chart

adjusted model network graph weights for default zones & net locations + fixe net char mgr UT issues

Net Char Manager segment algorithm fix to handle Mobility events

Added Notification specs to swagger UI

Model update for Zone network characteristics

swagger doc update

Net Char Manager support for latency, jitter & packet loss + TC Engine cleanup