revert test data

Author: paullatzelsperger

.github/workflows/verify.yaml

@@ -171,7 +171,6 @@ jobs:
       - name: Starting MIW, Keycloak and Postgres Servers
         run: |
           cd edc-tests/miw-tests/src/test/resources
-          mkdir postgres_data
           docker compose up --wait || docker compose logs 
 
       - uses: nick-fields/retry@v2

edc-tests/miw-tests/src/test/java/org/eclipse/tractusx/edc/tests/miw/README.md

@@ -3,7 +3,8 @@
 ## Test setup
 
 As test subject we used a `docker-compose.yml` file located in `src/main/resources/`. From that directory, simply
-execute `docker compose up --wait`.
+execute `docker compose up --wait`, and then, once everything is started,
+run `docker exec -i resources-postgres-1 /opt/seed.sh` to seed test data.
 
 ## Test suite description
 

edc-tests/miw-tests/src/test/resources/docker-compose.yml

@@ -26,7 +26,7 @@ services:
   postgres:
     image: postgres
     volumes:
-      - ./postgres_data:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql/data
       - ./db.sh:/docker-entrypoint-initdb.d/init-database.sh
       - ./seed.sh:/opt/seed.sh
     environment: