Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1369737
Description of problem:
With 6.2.1 there GET and DELETE of templates_combinations is not working anymore.
This is a regression over 6.0/6.1 where the same process worked for years.

Steps to Reproduce:
1. Assiocate a template with a hostgroup
2. Get association using the API GET template_combinations/:id
3. Delete association using the API DELETE template_combinations/:id

Actual results:
Step 2 and 3 are giving a resource not foudn

Expected results:
Step 2 lists the tempmplate combination
Step 3 deletes the template combination

Additional info: