LU-13093 osd: fix osd_attr_set race

LU-13093 osd: fix osd_attr_set race

The race between tgt_brw_write->ofd_write_attr_set and
ofd_attr_set took a place, and it could set a wrong attributes.
ofd_write_attr_set() does checks and declarations and sleeps on
ofd_read_lock. Another thread executes ofd_attr_set() and sets
initial uid/gid. After that the first thread wakeups and sets
another uid/gid. But ofd_write_attr_set should change attributes
for initial time only.
This also leads to a bug at credits check cause uid was changed
between declaration and attr_set.

osd_trans_exec_check(ATTR_SET) has a wrong place when xattr_set
is called. Also xattr doesn't have osd_trans_exec_op.

lustre-OST0001: opcode 0: used 9, used now 9, reserved 1
create: 0/0/0, destroy: 0/0/0
attr_set: 1/1/9, xattr_set: 2/274/0
write: 0/0/0, punch: 0/0/0, quota 6/6/0
insert: 0/0/0, delete: 0/0/0
ref_add: 0/0/0, ref_del: 0/0/0
LBUG

Cray-bug-id: LUS-8133
Fixes: 9f79d4488  ("LU-10048 ofd: take local locks within transaction")
Signed-off-by: Alexander Boyko <c17825@cray.com>
Change-Id: Id36ff633b0d97fff345ec105e0aa1b14fccafce4
Reviewed-on: https://review.whamcloud.com/37117
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andrew Perepechko <c17827@cray.com>
Reviewed-by: Andriy Skulysh <c17819@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>