HSEARCH-1628 Missing version of Maven plugins for docbook and asciidoc
HSEARCH-1628 Update maven-checkstyle-plugin to 2.12.1
HSEARCH-1627 Improve debugging options of Karaf features file
HSEARCH-1621 Update Apache Lucene version to 4.9.0
HSEARCH-1621 IndexWriterConfig needs to be rebuild for each IndexWriter
HSEARCH-1621 Update hibernate-search-engine to the new Lucene API
Clarify error message