Put EUMETSAT under services on home dashboard.

Required in the event of stale NREN dashboards

Exclude missed folders/dashboards for some orgs

Now includes excluded dashboards and NRENs per org.

Use datasource-specific config instead of environment config
Add influxdb datasource config
Remove unused config keys

used when provisioning data sources

(de)provisioning dashboards WIP.
Datasources still not implemented.
No tests implemented.