LU-3467 target: move OUT to the unified target code

- Move OUT handler to the unified target code, so it can be
  used by both MDS and OST.
- Make OFD able to handle OUT requests.
- Rename MDS_MDS_PORTAL to the OUT_PORTAL and MDS_OUT_... defines
  just OUT_... since they are independent from MDS now.

Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Change-Id: I3d595f18245f1db2619b7d15f94e4b61e882f114
Reviewed-on: http://review.whamcloud.com/6763
Tested-by: Hudson
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
LU-3467 target: FLD to use unified request handler

FLD is switched to unified target code, now it provides
own handler to be called by unified request handler.

Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Change-Id: I04fd6af9d11f2208ad220be25bb3245cc5edcccd
Reviewed-on: http://review.whamcloud.com/6764
Tested-by: Hudson
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
LU-3467 seq: unified SEQ handler

move SEQ handler from MDT to the FID module so it can
be used from any target.

Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Change-Id: I1777eddd748486aab275e4440f96685bed0b104a
Reviewed-on: http://review.whamcloud.com/6765
Tested-by: Hudson
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>