HSEARCH-1420 Migration from AssertionFailure on commons-annotations and making it a checkstyle rule
HSEARCH-1420 Replacing usage of HCANN StringHelper with the one from Search, and making a checkstyle rule for it
HSEARCH-1420 Strip down StringHelper to the methods actually used in Hibernate Search
HSEARCH-1421 Cleanup and consistency for BoostStrategy initialization
HSEARCH-1421 Cleanup FilterDef instance initialization
HSEARCH-1421 Cleanup Discriminator class initialization