Author: Yoann Rodière <yoann(a)hibernate.org>
Date: 2016-11-30 (Wed, 30 Nov 2016)
HSEARCH-2486 Enable @ContainedIn on classes whose only link to Search is one of their
Those classes were being ignored until now, because we were checking
whether classes are relevant to Hibernate Search without taking into
account their superclasses, thereby skipping metadata building entirely.