LU-3344 tests: Verify file handle system calls

LU-3344 tests: Verify file handle system calls

New system calls name_to_handle_at() and open_by_handle_at() are added
to Linux kernel 2.6.39. Added test to verify these work correctly with
Lustre.

Signed-off-by: Swapnil Pimpale <spimpale@ddn.com>
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: Icbfc9642cd550ac44d379263836782ffbf4a74f4
Reviewed-on: http://review.whamcloud.com/7247
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Reviewed-by: Jian Yu <jian.yu@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>