LU-9771 util: rename LCM_FL_NOT_FLR to LCM_FL_NONE

LU-9771 util: rename LCM_FL_NOT_FLR to LCM_FL_NONE

Having "lfs getstripe" print out "lcm_flags: not_flr" is not very
useful, as the composite files may not relate to FLR (e.g. PFL).
Rename "LCM_FL_NOT_FLR" to "LCM_FL_NONE" so it is more clear there
are no composite flags on the layout.

Print out "0" for flags if no flags are set, to match old behaviour.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Ib3701da8368253969567b927300cd42bc33ebbe5
Reviewed-on: https://review.whamcloud.com/31047
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Tested-by: Jenkins
Reviewed-by: Jian Yu <jian.yu@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>