Test to ensure that old builds from edited updates get pruned from the updateinfo

On F19 yum, this test causes yum to spit out the following warning: "An update
notice is broken, or duplicate, skipping: FEDORA-2013-0001" The next commit
will resolve this.
Avoid adding duplicate notices to the UpdateMetadata (#960642)

This fixes the edge case where an update is edited and a build is replaced with
a newer version. Two notices would then get added to the metadata with the same
updateid, which would cause confusion in yum.

https://bugzilla.redhat.com/show_bug.cgi?id=960642