SOLR-4813: Fix SynonymFilterFactory to allow init parameters for tokenizer factory used when parsing synonyms file (merge r1482527; and r1479892 for needed enhancements in BaseTokenStreamFactoryTestCase)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_3@1482619 13f79535-47bb-0310-9956-ffa450edef68