LUCENE-4723: Add AnalyzerFactoryTask to benchmark, and enable analyzer creation via the resulting factories using NewAnalyzerTask. (merged trunk r* LUCENE-4723: Add AnalyzerFactoryTask to benchmark, and enable analyzer)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1439513 13f79535-47bb-0310-9956-ffa450edef68