Description of problem:
Custom product subscription shows up as "null" on activation key, unable to attach. Results in error: undefined method `redhat?' for nil:NilClass

Version-Release number of selected component (if applicable):
6.2.0

How reproducible:
everytime

Steps to Reproduce:
1.Create custom product
2.Create activation key
3.Add custom product subscription to activation key

Actual results:
undefined method `redhat?' for nil:NilClass

Expected results:
Custom subscription added to activation key

Additional info:
Workaround: Register client without activation key. Manually attach custom subscription to client.