Facter returns exit code 1 when not using --puppet

```
root@server815:~# facter --version
3.5.1 (commit 4dd3423921c3e46906942fa76bebff7afbc1c0e7)
root@server815:~# facter hostname
server815
root@server815:~# echo $?
1
root@server815:~# facter -p hostname
server815
root@server815:~# echo $?
0
```