LU-1842 ldlm: add support for quota LVB

LU-1842 ldlm: add support for quota LVB

This patch defines new LVB types for quota.
A new request buffer is also added to glimpse AST to allow the server
to pass additional information about the callback to the client.
This additional buffer will only be used in conjunction with quota
locks for the time being.

Signed-off-by: Johann Lombardi <johann@whamcloud.com>
Change-Id: If5842bfff79d24e7d11ef33c47edb96fe6f11e76
Reviewed-on: http://review.whamcloud.com/4107
Reviewed-by: Niu Yawei <niu@whamcloud.com>
Tested-by: Hudson
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>