postgres: store DB password with other secrets

Let’s uncomplicate our lives. Also I’m not sure if the ~/.pgpass stuff
ever worked properly or even at all.

roles/netbox/tasks/main.yml

@@ -65,6 +65,8 @@
       line: "ALLOWED_HOSTS = ['{{ dns_name }}']"
     - key: 'USER.*PostgreSQL username'
       line: "    'USER': '{{ user }}', # PostgreSQL username"
+    - key: 'PASSWORD.*PostgreSQL password'
+      line: "    'PASSWORD': '{{ password.db_pass }}', # PostgreSQL password"
     # XXX unnecessary?
     #- key: '(OPTIONS|PASSWORD).*PostgreSQL password'
     #  line: "    'OPTIONS': { 'passfile': '{{ user_info.home }}/.pgpass' }, # PostgreSQL password"