LU-8454 mountconf: delay FS default stripe config setting

LU-8454 mountconf: delay FS default stripe config setting

Previously http://review.whamcloud.com/21612 disabled filesystem
default stripe config setting after 2.10, this is too aggressive,
now delay this feature till > 2.13.53.

Also #ifdef more unused functions in this feature.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Change-Id: Ic4d8c9abc837f4d9c9c7992b1f297dbb361beb47
Reviewed-on: http://review.whamcloud.com/22580
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>