Enable creation of admin users

If a user under `pgpool.users` has a `admin: true` set, they will be
created with the `-d` (allow CREATE DATABASE) `-r` (allow CREATE ROLE)
and `-s` (superuser) flags.

Fixes #3

Author: jhunt

jobs/postgres/spec

@@ -93,7 +93,7 @@ properties:
     default: ~
 
   pgpool.users:
-    description: "A list of {username: ..., password: ...} objects for defining pgpool users"
+    description: "A list of {username: ..., password: ...} objects for defining pgpool users.  Setting the 'admin:' key on a user will make them a superuser."
     default: []
 
   pgpool.databases:

jobs/postgres/templates/bin/ctl

@@ -109,7 +109,7 @@ EOF
     echo "[$(date)] setting up user <%= user['username'] %>"
     set -x
 
-    createuser -U vcap -p <%= port %> -DRS -El <%= user['username'] %>
+    createuser -U vcap -p <%= port %> <% if user['admin'] %>-drs<% else %>-DRS<% end %> -El <%= user['username'] %>
     createdb   -U vcap -p <%= port %>       -O <%= user['username'] %> <%= user['username'] %>
 
     psql -p <%= port %> -U vcap postgres -c "ALTER ROLE \"<%= user['username'] %>\" WITH PASSWORD '<%= user['password'] %>'"

templates/jobs.yml

@@ -42,6 +42,7 @@ jobs:
             password: quill
           - username: hedgehog
             password: frank
+            admin:    true
           - username: smoke-tests
             password: if-ya-got-em
         backend: