rgw_bucket.cc: return error if update_containers_stats() fails

In case need_stats is set on rgw_read_user_buckets() and the
update_containers_stats() call fails, not only print out a message
but also return the error to the function caller.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
Dumper::dump_entries(): remove not needed variable

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
linux_fiemap.h: remove twice included int_types.h

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
SimpleLock.h: remove twice included osd_types.h

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
SimpleLock.h: remove unused private function clear_more()

Remove unused private function clear_more(), it's replaced by
try_clear_more().

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>