LU-12998 tests: fix conf-sanity/112a version check

LU-12998 tests: fix conf-sanity/112a version check

Fix version number in conf-sanity test_112a version due to
skew before landing the patch.

Fixes: b2be94f559 ("LU-12998 mds: add no_create parameter to stop creates")
Test-Parameters: trivial testlist=conf-sanity env=ONLY=112 serverversion=EXA6
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I080de5421b918cf5e0d692740fb37b514a6c1014
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/53607
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>