Workaround EL6 build failures.

Picking up openjdk 1.8 in brew, which should not be happening for a variety of
reasons/bugs.

For now we'll require epoch >= 1 which will not match 1.8.
1150234: Hibernate error when virt_limit removed from product

Attribute was getting set on pool to indicate delete need.
Product attributes were getting reset on pool for virt_limit removal.
Each operation causes a hibernate error when pool.lockAndLoad is called.
Automatic commit of package [candlepin] release [0.9.26.3-1].