Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-matrix/tasks/create-and-seed-database.yml

@@ -0,0 +1,13 @@
+# The following parameters need to be pased:
+# 
+# - database_instance
+# - database_name
+# - database_username
+# - database_password
+- name: "create {{database_name}} database"
+  include_role:
+    name: service-rdbms-postgres
+  when: applications | is_feature_enabled('central_database',application_id)
+
+- name: "include seed-database-to-backup.yml"
+  include_tasks: "{{ playbook_dir }}/roles/backup-docker-to-local/tasks/seed-database-to-backup.yml"