LU-1842 quota: qsd lock

LU-1842 quota: qsd lock

qsd lock glimpse/blocking ast, qsd lock cancel/match functions.

Signed-off-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Niu Yawei <niu@whamcloud.com>
Change-Id: Ief424ca77dd9538d56689410fadfd71b01a03974
Reviewed-on: http://review.whamcloud.com/4129
Tested-by: Hudson
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Mike Pershin <tappro@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>