Update 17-grafana-multitenancy.md

Multi-tenancy in Grafana

Grafana Multi-tenancy in Grafana will limit the visibility of dashboard

to the user who created.

Grafana multi-tenancy limits the visibility of dashboard

to the user who own it.

Every user in OSM will have a corresponding user in Grafana and the

password in Grafana is username.

password in Grafana is same as the OSM username.

Below points has been covered-

This features has the following use cases.

-   When a new user is created in OSM then a new user with same username will be created in Grafana.