LU-337 Fix alloc flags in alloc_qinfo()

LU-337 Fix alloc flags in alloc_qinfo()

CFS_ALLOC_STD allows a hang when the alloc_qinfo() results
in a cache_alloc_refill, and kicks off the ldlm shrinker.
The shrinker may hang in sync_page() on the same page on
which we already hold the lock.

Change-Id: I9d7ccfcd5258c537af4d4f1d0bf2a190f4fc89c7
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/880
Reviewed-by: Bobi Jam <bobijam@whamcloud.com>
Tested-by: Hudson
Reviewed-by: Oleg Drokin <green@whamcloud.com>