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-wordpress/tasks/install.yml

@@ -0,0 +1,12 @@
+- name: "Run WordPress core install via WP CLI"
+  command: >
+    docker-compose exec -T -u www-data application
+    wp core install
+      --url="{{ domains | get_url(application_id, web_protocol) }}"
+      --title="{{ applications[application_id].title }}"
+      --admin_user="{{ applications[application_id].users.administrator.username }}"
+      --admin_password="{{ applications[application_id].credentials.administrator_password }}"
+      --admin_email="{{ applications[application_id].users.administrator.email }}"
+      --path="{{ wordpress_docker_html_path }}"
+  args:
+    chdir: "{{ docker_compose.directories.instance }}"