Fixes regression introduced by commit
c88cce27.

fix exporting all answers on session export

See merge request !93

Migration version now falls back to -1 if no document exists.

Limit logging for profile handling to WARN level for privacy reasons.

* Adjust stages to increase parallelization
* Run SonarQube at the end and adjust dependencies so it has all data
  available

GitLab can handle this w/o scripting by now.

Refactored deployment script to allow flexible deployments for different
hosts and environments.