Moved createTemp* to LuceneTestCase, removing it from SolrTestCaseJ4. Created common infrastructure that creates temporary files and folders under the suite's master folder. Created a rule that cleans up afterwards (or provides an explicit message if something fails to clean up).:
lucene/dev/branches/solr5914/lucene/analysis/common/src/test/org/apache/lucene/analysis/util/TestFilesystemResourceLoader.java