Red Hat email cleanup

Removed emails that no longer exist in the "@redhat.com" domain in order
to increase readability and manageability of this list.

If these individuals still contribute to oVirt their current emails
should be added to the list.

Change-Id: I5e36bac3037151693dc700ffa7b9358c3e37116e
Signed-off-by: Allon Mureinik <amureini@redhat.com>