LU-11482 flr: Inherit flags from template

LU-11482 flr: Inherit flags from template

New files created in directories with a default layout
should inherit the per-component layout flags.

This allows us to set the prefer or nosync flags in a
default layout and apply them to files created in that
directory.

Cray-bug-id: LUS-6574
Signed-off-by: Patrick Farrell <paf@cray.com>
Change-Id: I053ca0f3db3e0967799f469feeb4f1f12b144be7
Reviewed-on: https://review.whamcloud.com/33326
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>