LU-11690 lod: fix LBUG with wide striping

LU-11690 lod: fix LBUG with wide striping

When striping extremely widely (~1600+ stripes), we reach
more than half of the theoretical limit of layout size,
and LBUG.

It is also possible to trigger this assert with
multi-component PFL files, where all the components are
below the stripe count limit, but together they exceed it.

PFL makes asserting based on LOV_MAX_STRIPE_COUNT
unworkable, so just remove the assert.  Further work is
planned to match up maximum allowed layout size with
the real maximum EA size.

Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: Id0240785792e7d4084ea6e53b44469a40e59043d
Reviewed-on: https://review.whamcloud.com/33708
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>