s3:vfs_gpfs: increase log level for EPERM and EACCES errors in gpfs_get_xattr()

Signed-off-by: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
Reviewed-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu May 15 02:19:41 CEST 2014 on sn-devel-104