Fixed buildLogs

@bparees FYI
I removed BUILD_ID gathering in https://github.com/openshift/origin/pull/335/files#diff-11587e7dcf72b238b397919567c4707eL146. I think if you want to keep collecting it in order to exercise buildLogs, you need come up with a different way of getting at the build ID. The way it is now in master is a race condition, and we shouldn't continue building upon that foundation.