Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1469148

Description of problem: We were trying to filter user/user groups/capsules/compute profiles/ compute resources. In filter, when we added field which was not present in list( any_string=any_string), it returned an error "Something went wrong" and log file had 500 Internal Server Error.

Version-Release number of selected component (if applicable): satellite 6.3.0 snap 6.0

How reproducible: always

Steps to Reproduce:
1. Navigate to Administer-> user/user groups/capsules/compute profiles/compute resources ( producible at any)
2. Filter as any_string=any_string

Actual results:
Shows the error as "Something went wrong" and the log file /var/log/foreman/production.log shows

Rendered common/500.html.erb within layouts/application (3.7ms)
2017-07-10 09:32:35 7d7c37e3 [app] [I] Rendered layouts/_application_content.html.erb (0.5ms)
2017-07-10 09:32:35 7d7c37e3 [app] [I] Rendered layouts/base.html.erb (2.6ms)
2017-07-10 09:32:35 7d7c37e3 [app] [I] Completed 500 Internal Server Error

Expected results: Error should be handled showing alert as "Field not recognised for searching" as happens in filtering hosts(Host -> All Hosts - > Filter ).

Additional info: