[JENKINS-MAVEN] Lucene-Solr-Maven-master #1873: POMs out of sync

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Build: https://builds.apache.org/job/Lucene-Solr-Maven-master/1873/

No tests ran.

Build Log:
[...truncated 36706 lines...]
BUILD FAILED
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/build.xml:783: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/build.xml:324: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/solr/build.xml:691: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/solr/common-build.xml:463: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/lucene/common-build.xml:1667: The following error occurred while executing this line:
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/lucene/common-build.xml:561: Unable to initialize POM pom.xml: Could not find the model file '/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-master/lucene/build/poms/solr/contrib/ltr/pom.xml'. for project unknown

Total time: 16 minutes 37 seconds
Build step 'Invoke Ant' marked build as failure
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any