To authenticate we need to use ID assigned by identity.
I added accessToken as a dependency to fetch new Services Metadata each time CSAT changes (it should be caused by the event emitter that @marcin is implementing) so I think this should be safe and avoid any race conditions.

Note: This code is used for testing anyway and will change after making logging to Identity mandatory,

Depends on D10327

1. Login to staging Identity (loginPasswordUser).
2. Call setCommServicesAuthMetadata.
3. Dispatch action with the new access token.
4. Check if the connection with staging Tunnelbroker was created.