EX-8130 lipe: Link a new statistics module

EX-8130 lipe: Link a new statistics module

This patch links the collection of statistics for
directories with the main collection of statistics
about file sizes. This way we collect all the statistics
at one time.

This patch also adds 2 new options for collecting statistics
via lipe_find3.

The -depth option serves as a limiter on the collection and
output of directory statistics to a file.
The -top-rating option allows adjustment of the size of the
table ranking the largest directories by size.

A mechanism has also been added that aallows a copy of the
path from the filter for correct data processing.

Test-Parameters: trivial testlist=sanity-lipe-scan3,sanity-lipe-find3
Signed-off-by: Vitaliy Kuznetsov <vkuznetsov@ddn.com>
Change-Id: Ia61f57536575fd17e40b6e34a0c4b9b5db9111c5
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/53990
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alexandre Ioffe <aioffe@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>