Fix code style.

Branch HEAD
b=14929
i=rread
i=panda

b=16098

Add URL for GPLv2 license in copyright headers

b=16098

change CFS license headers to Sun headers

b=15797
i=Nikita
i=Vitaly

(1)Replace "la->la_valid" with "ma->ma_attr_flags" to pass
   "MDS_OPEN_OWNEROVERRIDE".
(2)Drop "lu_attr" parameter for xattr_{set,del} method.
   The caller should guarantee to update the object ctime.
(3)MDT can detect whether the "setattr" is SOM case or
   truncate case, it is unnecessary to pass special flag
   ("MDS_ATTR_TRUNC") from client to MDT for truncate case.

b=14975
i=green
i=huanghua

Openlock cache forward port

  i:nathan, adilger

r=nikita,shadow

- fixed handling for OBD_FAIL_$PREF_$OPC_NET fail_ids in mdt. Former code did not
check it correctly (due to typo with && instead of &) in mdt_req_handle() and
they all did not work. In same time, some handlers like mdt_close() and
mdt_enqueue() tried to check them again (result of some wrong fix) but again, did
it not correctly. They returned 0 error without doing anything. This should
have to emulate network failure. But as they did not allocate reply buffer and
returned 0 error, they caused rs != NULL assert in ptlrpc. Fxing this also fixed
replay-single.sh test_53* and replay_dual.sh test_12 and possibly others;

- removed checking for NET fail_id in mdt_close() and mdt_enqueue() - sources
of recent assert;

- added sanity check in mdt_req_handle() for any other invalid situation about
returning 0 error and not allocating reply buffers;

- removed mdt_reply(), move its one line call into mdt_req_handle(). This was
needed to simplify handling NET fail_ids in which case we should just return 0
and make sure that no reply is sent;

- comments and cleanups;

- in reply-dual.sh - remove test 8 from ALWAYS_EXCEPT. It passes in HEAD.
Originally for placed into ALWAYS_EXCEPT for old mds code and later moved to
HEAD test scripts but as mds in HEAD is completely new this bug is making any
sense there;

- in reply-single.sh - remove tests 0b 39 56 from ALWAYS_EXCEPT. They are
passing in HEAD. Also they are obsolete and related to closed bugs.

because LASSERT on both the data supplied by a client, and the data
on disk is dangerous and incorrect.

b=15574
i=adilger
i=shadow

b=14929
i=zam
i=nikita

b=3462
i=johann
i=adilger

patch addressing replay-single test53 set port for HEAD.

i=yong.fan
i=rahul.deshmukh
i=nikita.danilov

- use req_capsule interface for client.
- add some interoperability support on server side.

b=12974
i=nikita
i=adilger

1) set as "inline" for such large function ("obd_fail_check()") is not suitable,
   replaced with normal function "__obd_fail_check_set()".
2) atomic operations for obd_fail_count (replace "static count" in obd_fail_check).
3) use "test_and_set_bit()" for "OBD_FAILED/OBD_FAIL_ONCE" check and set to avoid
   unexpected racing condition between multi-thread ops.
4) some cleanup for OBD_FAIL_XXX macro.

b=14064

- readdir() for liblustre: i=nikita,fanyong
- flock for liblustre and various fixes for liblustre: i=umka,fanyong

  b:14001
  i:nikita, yury

b=12763
i=tappro
i=ericm
Disable uid in capa struct and capa sanity test.

b=13581
i=tappro
i=huanghua

Replay Size-on-MDS related RPCs properly.