service: Support cap_add

roles/service/tasks/main.yaml

@@ -42,6 +42,7 @@
     container_ip: "{{ service_container_ip }}"
     container_secrets: "{{ _service_container_secrets }}"
     container_env: "{{ service_container_env }}"
+    container_add_capabilities: "{{ service_container_add_capabilities }}"
     container_requires: "{{ _service_container_requires }}"
     container_wants: "{{ _service_container_wants }}"
     container_auto_update: "{{ service_auto_update }}"