LU-5133 tests: Add version check in sanity/238

LU-5133 tests: Add version check in sanity/238

Fix for LU-4659 was not included until after 2.5.57 and after 2.5.1.
Ensure MDS is running one of these valid branches before allowing the
test to run.

Test-Parameters: alwaysuploadlogs envdefinitions=ONLY=238 \
ossjob=lustre-b2_5 mdsjob=lustre-b2_5 ossbuildno=42 mdsbuildno=42 \
testlist=sanity

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Signed-off-by: Jian Yu <jian.yu@intel.com>
Change-Id: If0601c048e6641b2cfcd27b7a6f62d8662440018
Reviewed-on: http://review.whamcloud.com/10559
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>