LU-790 tests: remove old get_lustre_version() calls

LU-790 tests: remove old get_lustre_version() calls

Replace old get_lustre_version() calls with lustre_build_version(),
since the former was deleted in commit 2a223541d2.  The few places
using get_lustre_version() were non-critical (just advisory messages)
but may generate errors messages in the test output.

Fix sanity-sec.sh to check the version on the mgs facet instead of
the mds1 facet, in case they are on separate nodes at some point.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I448bc13abbd36e86d0aa8cd6e22bacc9b6def27c
Reviewed-on: http://review.whamcloud.com/14768
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>