Description of problem:
Pulldown doesn't display version 6 as an option from which to select errata when creating a custom channel.

Version-Release number of selected component (if applicable):
Satellite 5.4.

How reproducible:

Always


1. Manage Software Channels
 1a. Clone Channel
 1b. Clone From base channel (RHEL v6 32-bit)
 1c. Clone: Original State
 1d. Create Channel
 1e. Create Channel

2. Select "errata"
 2a. Add Errata
 2b. Add Red Hat Errata

Actual results:
In the "Channel Version" pulldown, RHEL ver. 2.1,3,4 and 5 are present,
but not 6. 

- if you were to click "View associated channels", you would no longer be able to see the RHEL6 channels in the second "Channel:" pulldown.

Expected results:
- '6' should be present in the "Channel Version" pulldown
- RHEL6 child channels sync'd to the satellite should be displayed in the "Channel:" pulldown such that their errata may be sync'd with the custom channel.

Additional info:
- 32-bit and 64-bit RHEL6 channels have been sync'd to this satellite, with several child channels.