[JENKINS-MAVEN] Lucene-Solr-Maven-6.x #51: POMs out of sync

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Build: https://builds.apache.org/job/Lucene-Solr-Maven-6.x/51/

No tests ran.

Build Log:
[...truncated 37264 lines...]
BUILD FAILED
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/build.xml:756: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/build.xml:299: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/solr/build.xml:672: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/solr/common-build.xml:464: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/lucene/common-build.xml:1681: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-6.x/lucene/common-build.xml:594: Error deploying artifact 'org.apache.solr:solr-map-reduce:jar': Error deploying artifact: Failed to transfer file: https://repository.apache.org/content/repositories/snapshots/org/apache/solr/solr-map-reduce/6.1.0-SNAPSHOT/solr-map-reduce-6.1.0-20160501.020446-48-sources.jar. Return code is: 502

Total time: 21 minutes 2 seconds
Build step 'Invoke Ant' marked build as failure
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any