LU-3364 tests: fix Lustre version number in sanity-lfsck.sh

LU-3364 tests: fix Lustre version number in sanity-lfsck.sh

The sanity-lfsck.sh was added by the following patch, which was included
since Lustre 2.3.60 instead of 2.2.90.

Lustre-commit: 21a9805abde3cbe1ffe046f2d9958d968303b8d3
Lustre-change: http://review.whamcloud.com/4911

Test-Parameters: envdefinitions=SLOW=yes,ENABLE_QUOTA=yes \
clientdistro=el6 serverdistro=el6 clientarch=x86_64 \
serverarch=x86_64 serverjob=lustre-b2_3 serverbuildno=41 \
testlist=sanity-lfsck

Signed-off-by: Jian Yu <jian.yu@intel.com>
Change-Id: I0f35b22409853852d8c7336e67f7b3661aa89f95
Reviewed-on: http://review.whamcloud.com/7019
Reviewed-by: Wei Liu <wei3.liu@intel.com>
Tested-by: Hudson
Reviewed-by: Fan Yong <fan.yong@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>