Add authentication to all microservices

[juhtornr]

Description

All micro services should require proper authentication even if they are not exposed to outside.

Proposed solution

There is at least two different options:

1. We can validate the access token that user passes to the frontend service (Dataedge or Zuul) and for example verify the token signature.

2. We can implement new authentication mechanism that is used internally in Data API.

Definition of Done

The feature is implemented, tested, reviewed and merged.