Add connection and execution timeouts for curl calls.

Set curl options  `CURLOPT_CONNECTTIMEOUT` and `CURLOPT_TIMEOUT` to 5 seconds instead of whatever the defaults are, which feel looooooong.
In the case where a setting is involved, it's best pratic to make the setting a constant at the top of the file. This way future users of the module don't have to go hunting for the setting. Something like:
```
define("RABBITMQ_STATUS_TIMEOUT", 5);
echo RABBITMQ_STATUS_TIMEOUT;