broker: require v8 (SCLized in RHEL 6)

Bug 1108762 - Need to install v8314 package to start openshift-broker service
https://bugzilla.redhat.com/show_bug.cgi?id=1108762

openshift-broker requires v8 at startup, but the packaging did not
express this requirement. Modified so it does.
Merge pull request #5799 from sosiouxme/bz1108762

Merged by openshift-bot