By default we should configure and use c3p0

In a default dev deploy, c3p0 isn't configured, so we can easily request more connections than the database is prepared to provide

This script fails to create up to 25 consumers.
```bash
#!/bin/sh
for i in `seq 1 200`;
do
    curl -s -k -u admin:admin -X POST "https://localhost:8443/candlepin/consumers?owner=admin&include=uuid" -H "Content-Type: application/json" -d '{"name":"testing", "type":"system", "facts":{"sockets":"7"}}' 2>/dev/null &
done
```

However with c3p0 working correctly, we can create all 200 consumer records.