SOLR-6073: Deprecate helper methods for CollectionsAPI SolrJ calls. Move towards using builder design for the calls.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1622126 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6073: Adding names to CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1622131 13f79535-47bb-0310-9956-ffa450edef68