DCD-386: Rework product_startup to support more systemd params and add tests for some corner cases.

roles/product_startup/handlers/main.yml

@@ -4,6 +4,9 @@
   service:
     name: "{{ atl_systemd_service_name }}"
     state: restarted
+  when: atl_startup_restart
 
 - name: Enable Product
   command: systemctl enable "{{ atl_systemd_service_name }}"
+  when: atl_startup_enable
+