LU-16153 tests: add version check to conf-sanity.sh test_133

LU-16153 tests: add version check to conf-sanity.sh test_133

conf-sanity.sh test_133 from the patch at
https://review.whamcloud.com/38136 has been landed since 2.15.51.
To avoid any interop failure, a version check is added there.

Test-Parameters: trivial
Signed-off-by: Emoly Liu <emoly@whamcloud.com>
Change-Id: Ic5c142faa6f61fe83ce86e67a7cee8d8b183cdaf
Reviewed-on: https://review.whamcloud.com/48541
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>