Merged revision(s) 1463794 from lucene/dev/trunk:
SOLR-4652: Fix broken behavior with shared libraries in resource loader for solr.xml plugins

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1463795 13f79535-47bb-0310-9956-ffa450edef68