LU-5683 clio: add CIT_DATA_VERSION

LU-5683 clio: add CIT_DATA_VERSION

Add a new cl_io type CIT_DATA_VERSION to get file data version. Remove
the old data version code (cl_object_obd_info_get() and
cl_object_data_version()). Add test_37() to sanity-hsm.sh to ensure
that data version is computed under the correct layout.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: If371c8e8c18e91d476f94de2e0170199252c088d
Reviewed-on: http://review.whamcloud.com/14649
Tested-by: Jenkins
Reviewed-by: Henri Doreau <henri.doreau@cea.fr>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>