Bug 1664296

Description of problem:
Error message have wrong links: Failure parsing Kickstart default PXELinux: undefined method `full_path' for nil:NilClass. [Edit]


Version-Release number of selected component (if applicable):
satellite-6.5.0-5.beta.el7sat.noarch (snap #10)


How reproducible:
always


Steps to Reproduce:
1. I'm in a state that when I click Hosts -> All hosts -> <host> -> Build,
   I'm getting error message in the dialogue:

> Warning: This will delete this host and all of its data! This host's stored facts and reports will be deleted too.
> The following errors may prevent a successful build:
> 
> Templates
> 
> Failure parsing Kickstart default PXELinux: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default PXEGrub: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default PXEGrub2: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default iPXE: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default finish: undefined method `full_path' for nil:NilClass.
> Failure parsing Kickstart default user data: undefined method `full_path' for nil:NilClass.

2. These failures above have "Edit" buttons which leads to links like:

    https://sat650snap4.example.com/templates/provisioning_templates/Kickstart%20default%20PXELinux/edit


Actual results:
That link gives "Oops, we're sorry but something went wrong Couldn't find Template with 'id'=Kickstart default PXELinux"

Correct link should have ID in it:

    https://sat650snap4.example.com/templates/provisioning_templates/14-Kickstart%20default%20PXELinux/edit


Expected results:
Link is correct or there is no such link