[FIXED JENKINS-19400] Configurable retention system for lazy-loaded build references.
Fixed AbstractLazyLoadRunMapTest failure.
Merge remote-tracking branch 'origin/master' into BuildReference-JENKINS-19400
Merge branch 'master' into BuildReference-JENKINS-19400
Merge branch 'BuildReference-JENKINS-19400'
[FIXED JENKINS-19400] Noting merge of #1055: BuildReference.HolderFactory.