LU-14125 obdclass: add grant fields to export procfile

LU-14125 obdclass: add grant fields to export procfile

Add ted_{grant,reserved,dirty} to the export
procfile for OSTs, to allow comparison between the
OST's idea of grants allocated to the client with
the client's idea.

Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Change-Id: Ib34582e2be55fe2007363b52cea4dee211b7f540
Reviewed-on: https://review.whamcloud.com/40563
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>