CYKLO-927 Refactor AlphanumericFilter to use PatternReplaceFilter which probably has more optimal code.
CYKLO-927 Extract method.
CYKLO-927 Make changes to flex file so that TextTokenizerInterface can be removed and replaced by StandardTokenizerInterface
CYKLO-927 Extract Lucene version into constant in SearchConstants interface and upgrade it to 4.1
CYKLO-927 Remove exception from message, keep it only in root cause.