SOLR-5764: Fix recently added tests to not use absolute paths to load test-files, use SolrTestCaseJ4.getFile() and getResource() instead; fix morphlines/map-reduce to not duplicate test resources and fix dependencies among them.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1570898 13f79535-47bb-0310-9956-ffa450edef68