ISPN-4767 DirectoryImplementor needs to handle PersistenceException on metadata load
ISPN-4767 Introduce a SlicedBufferIndexInput to be able to slice a SingleChunkIndexInput
ISPN-4767 Introduce a SlicingInfinispanIndexInput to support slicing of an InfinispanIndexInput
ISPN-4767 Other minor changes to make Lucene 4.9 happy