LUCENE-5322: define-lucene-javadoc-url should only be called once as part of Solr's  generate-maven-artifacts

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1541653 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5399: Add distributed request tracking information to DebugComponent

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1541774 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5437

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1541830 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5308: A new 'migrate' collection API to split all documents with a route key into another collection

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1541832 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5438: DebugComponent throws NPE when used with grouping

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1541849 13f79535-47bb-0310-9956-ffa450edef68