Rename internal Hibernate Search directory provider slot

We distribute two modules for the hibernate search directory provider: one self contained (with Infinispan deps) to be used together with the Hibernate Search bundled in Wildfly and another for usage with Infinispan query.
Currently both share the same name convention for-hibernate-search-x.y, that could lead to clashes.

To prevent this and other possible clashes, we should rename hibernate search slot of the modules distributed within the zip, so that they are not inadvertently used outside Infinispan and override either the hibernate search that is inside Wildfly or the modules distributed by Hibernate Search itself.