Description of problem:
Running mock clutters/pollutes /var/log/messages with yum installation logs.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Build an arbitrary package using mock
2. Check /var/log/messages
Long series of yum logs in /var/log/messages related to mock invoking yum to
install packages inside of chroots.
mock/yum not to clutter /var/log/messages with yum-logs.
This renders yum-logs in /var/log/messages more or less void because "real yum
logs" can't be destinguished from "mock chroot yum-logs".
root cause is yum. Dup of already-existing yum bug.
*** This bug has been marked as a duplicate of 321341 ***