create molecule scenario for monitoring role

roles/monitoring/defaults/main.yml

@@ -1,6 +1,7 @@
 ---
 # defaults file for roles/prometheus
 grafana_admin_user: admin
+grafana_admin_password: password
 grafana_domain: "{{ inventory_hostname }}"
 grafana_web_path: /grafana
 grafana_protocol: http
@@ -9,9 +10,11 @@ grafana_port: 3000
 prometheus_domain: "{{ inventory_hostname }}"
 prometheus_web_path: /prometheus
 prometheus_port: 9090
+prometheus_password: password
 
 nginx_default_path: "{{ grafana_web_path }}"
 
 alertmanager_domain: "{{ inventory_hostname }}"
 alertmanager_web_path: /alertmanager
 alertmanager_port: 9093
+alertmanager_password: password