Add postgress docker compose examples + Flyway Modularity Support (#2089)

* added postgress docker compose examples
* move mysql flyway into server (remove from hawkbit-repository-jpa-flyway)
* in starters is added posgress and sqlserver flyway support - see [Flyway Modularity](https://github.com/flyway/flyway/issues/3780)

_release_notes_

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

docker/docker-compose-monolith-mysql.yml

@@ -22,10 +22,10 @@ services:
     environment:
       - 'PROFILES=mysql'
       - 'SPRING_DATASOURCE_URL=jdbc:mariadb://mysql:3306/hawkbit'
+      - 'SPRING_DATASOURCE_USERNAME=root'
       - 'SPRING_RABBITMQ_HOST=rabbitmq'
       - 'SPRING_RABBITMQ_USERNAME=guest'
       - 'SPRING_RABBITMQ_PASSWORD=guest'
-      - 'SPRING_DATASOURCE_USERNAME=root'
     volumes:
       - artifactrepo:/artifactrepo
     restart: always