LU-3920 tests: check MDS version before testing HSM feature

LU-3920 tests: check MDS version before testing HSM feature

Sanity tests 56y and 229 fail when MDS does not have HSM
support. Check MDS version and skip the tests in that case.

This patch is back-ported from the following one:
Lustre-commit: b635ddd7f6ebe04681fae34da3b26e3b6b5301f0
Lustre-change: http://review.whamcloud.com/8121

Test-Parameters: envdefinitions=SLOW=yes,ENABLE_QUOTA=yes,ONLY=229 \
ossjob=lustre-b2_4 mdsjob=lustre-b2_4 ossbuildno=70 mdsbuildno=70 \
testlist=sanity

Xyratex-bug-id: MRP-1417

Signed-off-by: Vladimir Saveliev <vladimir_saveliev@xyratex.com>
Change-Id: I6bf3bffd45ad8a2a7c72424447a4d486389c8e8d
Signed-off-by: Jian Yu <jian.yu@intel.com>
Reviewed-on: http://review.whamcloud.com/8734
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>