Revert changes for running local frontend test

Description

• To avoid problems with the deployment, the changes introduced by !129 (merged) should be reverted
• Reasons:
  • on the stage and production servers the frontend service connects to a schema of the rmd_tsm_<adm|rw> user and has not it's own connection (as as initially thought)
  • the frontend-db service would be started, but not used
  • if we need to integrate to a new database, the setup script for the frontend schema would not be applied, because it was removed from the database volume mount
  • the frontend service now depends on the frontend-db service, but not the actual database
  • the test for the frontend have nothing to do with the orchestration of the whole timeIO

Conclusion/Task

• the changes to run the tests for the frontend service should be done in the tsm-frontend repository and should not concern the tsm-orchestration
  • task: create another issue/mr in the tsm-frontend repository, see tsm-frontend#47 (closed)
• revert the changes, introduced by !129 (merged)