added MetricsHandler to store REST API metrics using Prometheus + updated charts & services to expose /metrics endpoint on port 9000

L2Meas endpoint implementation

Upgraded InfluxDB to 1.8 from 1.7

Prometheus Scraping of new Auth Service metrics

Resolved issues related to pvcs delete and prerequisite crds

- Added code for creating and deleting prerequisites crd's

Location Service lint fix

plugtest and ut small fixes

Upgraded kube-state-metrics chart

Updated Grafana Helm charts

Added Prometheus monitoring and enabled metrics collection for dependencies

- Added priority in repocfg to make sure prometheus is first one to be installed
- Enabled servicemonitor in node-exporter and deleted the one in prometheus
- Added affinity for prometheus statefulsets
- Added meeporigincore