LU-11409 osc: grant shrink shouldn't account skipped OSC

LU-11409 osc: grant shrink shouldn't account skipped OSC

otherwise only the first 100 OSCs are subject to grant shrink procedure.

Lustre-commit: 2b215d3763a8a37ff9d65bf1a250fcdaa27c4bdf
Lustre-change: https://review.whamcloud.com/33206

Change-Id: I65ed247b91422effb8f278d1991d4a5ba1c24814
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/40564
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>