fix resend requests for ldlm imports.

Branch HEAD
b=17695
i=umka
i=tappro

i=Adilger
i=Tappro
test_7-b fix: use do_nodes instead of loop to run rundbench

i=Tappro
FAIL_ON_ERROR=false fix: force suits exit 1 if some tests failed

r=shadow

- fixes in test_59b

i=Adilger
replace cleanup_and_setup_lustre fn by check_and_setup_lustre fn

  b:12512
  i:grev, adilger

o=Adilger
i=grev
skip replay/recovery tests if remote MDS/OSS nodsh

b=16551 (att 19835)
i=Nathan
do skip_rem[mds|ost] check only if test suit is run; fail acc-sm if
tests suits were skipped due to nodsh

b=17326
i=Alexey.Lyashkov
remove now-useless remount/recofig for liblustre;
always add accept=all to lnet module

- fixed using "mds" in test 59b

r=shadow

- small to test from Mike

r=johann,adilger

- fixes resent rpcs for those sent by set and also fixes log_cancel resent handling;
- cleanups.

i=Johann
skip some tests if there are several ost services on oss node

AT test sleep use current AT service time.
b=16990
o=Brian Behlendorf <behlendorf1@llnl.gov>
r=nathan
r=ericm

let AT estimation cool down before doing AT tests.
b=16990
r=nathan

r=adilger,shadow

- various CMD related fixes.

i=Adilger
o=Komal.Nawandar

use lctl [set|get]_param  instead of LPROC
lost attachment 15523 part (ported to HEAD)

i=Tappro
several clients config fixed

b=16570
i=h.huang, robert.read

Make MDS_SETXATTR request replayable.

i=Nathan.Rutman
restore the original at_max on all nodes

i=Tappro
tests 20c, 32, 37 fixes: let pid to be killed

i=Tappro
test_34 fix: let pid to be killed

b=16570
i=h.huang

add a testcase on replaying setxattr op.

i=Adilger
test_70a: fix sed pattern

Create subdirectory before trying to create files therein.
b=16369
i=johann

port Adaptive Timeouts from b1_6 to HEAD.
b=14071
r=nathan
r=adilger

i=Adilger
remove tdir creation from run_one: the test has to create tdir by
itself if it needs this dir

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.

b=15929
i=grev

Cleanup PATH in tests so absolute paths are used, and
each path is added at most once.

i=Adilger

rename subtests to skipping mechanism works properly

r=adilger

to replace the sysctl lustre.* and lnet.* instances with lctl {get,set}_param

i=Adilger

config file for several remote clients; replay-single test_70a, test_70b

r=Andreas

replace /proc/fs/lustre access with lctl set_param

i=Adilger

replay-single test_61* fixes: set fail loc on all oss

i=Scjody
i=Adilger
multiop race fix

because this bugs fixed already.

b=13821
i=wangdi
i=umka

i=grev

add the following fail tests to always-except list:
sanity        65a, 65e
replay_dual   14
insanity      2, 4
replay_single 56, 59
conf_sanity   33a
liblustre

b=3462
i=johann
i=adilger

patch addressing replay-single test53 set port for HEAD.

i=Adilger

change tdir to start from d0 to be cleaned up automatically

i=Adilger

use new-style setstripe args

i=Adilger

report the slow and excluded tests separately