To fix failing couchbase-cli commit validation script

Change-Id: I5ca3e5c380714cdf5eed758cacf228acf2cd504d
Reviewed-on: http://review.couchbase.org/38413
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>