Log4jConfigurer initLogging(location) throws FileNotFoundException for file URL as well

Issue: SPR-9725
JdbcUtils.getResultSetValue avoids re-retrieval from ResultSet for Blob/Clob content (for Derby compatibility)

Issue: SPR-8810
EclipseLinkJpaDialect preserves lazy retrieval of UnitOfWork as far as possible

Issue: SPR-12319