LU-11161 tests: start running sanity 160g again

LU-11161 tests: start running sanity 160g again

sanity test 160g was failing when run in a DNE configuration
and we stopped running this test meaning added to the
ALWAYS_EXCEPT list. The problem is that the test did not
write enough files to exceed changelog idle index threshold
for deregistering users.

Start running sanity test 160g with DNE testing again.

Test-Parameters: trivial
Test-Parameters: ostfilesystemtype=ldiskfs mdtfilesystemtype=ldiskfs clientcount=2 mdscount=2 mdtcount=4 osscount=1 ostcount=8 testlist=sanity
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I286ef8eb7c4638ff8f357db54c4926d5a2f20ac4
Reviewed-on: https://review.whamcloud.com/33994
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>