Filtering connection lists by device name raises an exception

[jeremystretch]

Environment

• Python version: 3.6.9
• NetBox version: 2.10.3

Steps to Reproduce

1. Create an interface connection between two devices
2. Attempt to filter the interface connections list using the name of either device (e.g. ?device=device1)

This also applies to the console and power connection lists.

Expected Behavior

Only the interface connections for the specified device should be listed.

Observed Behavior

A ValueError exception is raised.

This was originally reported as part of #5627.