LU-9679 obdclass: remove init to 0 from lustre_init_lsi()

LU-9679 obdclass: remove init to 0 from lustre_init_lsi()

After allocating a struct with OBD_ALLOC, there is no value in setting
a few of the fields to zero.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Ib1291661ba9124219e69c7a4d3c6ee4dcf14e021
Reviewed-on: https://review.whamcloud.com/39135
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>