LU-2361 quota: keep slave's glb idx consistent with master's

LU-2361 quota: keep slave's glb idx consistent with master's

Issue glimpse callback and bump global version each time quota
settings are modified in the global index. This way, the global
recovered if required.

Signed-off-by: Johann Lombardi <johann.lombardi@intel.com>
Change-Id: I91c11b8bce68c8f96289588e612295ece7664c3f
Reviewed-on: http://review.whamcloud.com/4632
Reviewed-by: Fan Yong <fan.yong@intel.com>
Tested-by: Hudson
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>