JCR-3629 - [jcr2spi]RepositoryException lost in o.a.j.jcr2spi.ItemManagerImpl while querying on remote nodes

-- Changed the logic to propagate the RepositoryException 
-- Adapted the logic in LazyItemIterator#skip to handle the checked RepositoryException

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/trunk@1507190 13f79535-47bb-0310-9956-ffa450edef68