Description of problem:
When customer use one AK without subscription, the auto-attach works as expected, if customer add one custom subscription, like zabbix or epel for example, the auto-attach doesn't work anymore to the base OS.

Version-Release number of selected component (if applicable):
6.2.9

How reproducible:
100%

Steps to Reproduce:
1. Create one AK without subscription
2. Register the Content Host using this AK, registration worked as expected.
3. Create a new one AK now with subscription related to custom repo *ZABBIX*
4. Register the Content Host using this new AK, registration add only the zabbix repo and bypass the auto attach of base OS.

Actual results:
Subscribe only zabbix repo.

Expected results:
Attach the Zabbix subsc and auto-attach the Base OS subs.

Additional info: