Description of problem:

When trying to show non-existent setting via hammer or API using it's id, we get
"undefined method" error.

How reproducible:
always

Steps to Reproduce:
1. On Foreman try: hammer settings info --id wrong_id
2. On Foreman try: curl -su admin:changeme https://$(hostname)/api/settings/wrong_id

Actual results:
1. undefined method `name' for nil:NilClass
2. {
"error": {"message":"undefined method `name' for nil:NilClass"}
}

Expected results:
Error: setting not found.