SOLR-5548: Give DistributedSearchTestCase / JettySolrRunner the ability to specify extra filters.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1550508 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5547: Creating a collection alias using SolrJ's CollectionAdminRequest sets the alias name and the collections to alias to the same value.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1550548 13f79535-47bb-0310-9956-ffa450edef68
SOLR-3702: A 'concat' function query to support concatenation of Strings

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1550656 13f79535-47bb-0310-9956-ffa450edef68
SOLR-3702: Reverting commit because it breaks QueryEqualityTest

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1550676 13f79535-47bb-0310-9956-ffa450edef68