* Add exported metrics visualization in grafana
Add graphics for request count and request latency for users, things,
http adapter and ws adapter services.
Signed-off-by: Aleksandar Novakovic <aleksandar.novakovic@mainflux.com>
* Rename grafana export file
Signed-off-by: Aleksandar Novakovic <aleksandar.novakovic@mainflux.com>
* Move metrics configuration to metrics dir
Signed-off-by: Aleksandar Novakovic <aleksandar.novakovic@mainflux.com>