Fix amqp URL and drop key now (not generated)

ansible/templates/alerta.conf

@@ -1,12 +1,11 @@
 [DEFAULT]
 endpoint = https://{{ domain }}/api
-key = {{ alerta_cli_api_key }}
 output = psql
 sslverify = True
 timezone = Europe/London
 
 [alerta-mailer]
-amqp_url = {{ db_type }}://{{ db_loc }}/
+amqp_url = "{{ db_type }}://{{ db_user }}:{{ db_passwd }}@{{ db_loc }}"
 dashboard_url = https://{{ domain }}
 debug = True
 email_type = text