Prevent server restarts when hash order changes

Ruby 1.8 has no guarenteed hash ordering. This makes Puppet restart gunicorn unexpectantly every now and then. By explicitly ordering the hash, this problem is solved.

```diff
--- /etc/default/gunicorn-api	2014-02-19 11:38:43.104831000 +0100
+++ /tmp/puppet-file20140219-15922-j0jydf-0	2014-02-19 11:42:06.320834639 +0100
@@ -2,6 +2,6 @@
 
 export DJANGO_SECRET_KEY=""
 export NR_API_KEY=""
-export API_HOST=""
 export OFFICE_PASS=""
+export API_HOST=""
 export API_KEY=""
```