Github user asfgit closed the pull request at:
https://github.com/apache/incubator-trafficcontrol/pull/487
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GitHub user dg4prez opened a pull request:
https://github.com/apache/incubator-trafficcontrol/pull/487
if primary parent list is empty use secondary
This moves the contents of the secondary parent list to the primary parent
list and empties the secondary list if the primary
