Description of problem:
Convert to RHEL template cannot be previewed.

Version-Release number of selected component (if applicable):

How reproducible:
always

Steps to Reproduce:
1. Navigate to Host -> JobTemplates
2. Find the "Convert to RHEL" template and open the edit view
3. Click on "Preview"

Actual results:
Error: Problem with previewing the template: error during rendering: undefined method '#name' for String::Jail (String). Note that you must save template input changes before you try to preview it.

Expected results:
The template should be previewed without any issues

Additional info:
A similar error can be found after executing the job in the "Preview templates" tab. But the job can still be executed. See attachment.