BVTCK-42 Adding assertions for ConstraintViolation#getLeafBean()
BVTCK-42 Adding/marking tests for ConstraintViolation#getExecutableParameters() and getExecutableReturnValue()
BVTCK-42 Adding/marking tests for ConstraintViolation#getInvalidValue()
BVTCK-42 Adding/marking assertions for PropertyPath and Node methods
BVTCK-42 Adding test for handling of "\$"
BVTCK-42 Adding test for xml configured group conversion on field level
BVTCK-42 Fixing/adding license headers