This is the following of the refactoring initialized in T2736/D4377 with the scheduler.

The database creation is delegated to the postgresql container, and the service database is initialized via the swh db init-admin command.

I have created only one diff instead of one per service to simplify the review.

• storage: let postgresql initialize the db and use the swh db init-admin command
• scheduler: remove PG* variable from the db configuration
• vault: let postgresql initialize the db and use the swh db init-admin command
• deposit: let postgresql initialize the db
• vault: let postgresql initialize the db and use the swh db init-admin command
• listers: let postgresql initialize the db and use the swh db init-admin command

docker-compose down -v
docker-compose up

docker-compose ps

All the service must be running