EX-4539 lipe: lipe_find3 print updates

EX-4539 lipe: lipe_find3 print updates

Change -print-json to accept a comma separated list of
attributes. Optional attributes may be specified by placing them
inside brackets. For example "lipe_find3 DEVICE -print-json
'uid,gid,som,[size,blocks]' will only print JSON for inodes with a
valid UID, GID, and SoM atrribute. If in addition the size and blocks
attributes of the inode are valid then they will be included in the
object as well. Support a pass-through --list-json-attrs option.

Change the default action to print to relative path. Adjust
sanity-lipe-find3 accordingly.

Test-Parameters: trivial testlist=sanity-lipe-find3 serverextra_install_params="--packages lipe-scan"
Test-Parameters: trivial testlist=sanity-lipe-scan3 serverextra_install_params="--packages lipe-scan" facet=mds1
Signed-off-by: John L. Hammond <jhammond@whamcloud.com>
Change-Id: Id380ca21e2b1aabf30f65fd3e14b7e2f7808d0a6
Reviewed-on: https://review.whamcloud.com/46630
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>